Measurement control method, user equipment, control node, and system

ABSTRACT

The present application discloses a measurement control method, a user equipment, a control node, and a system, relates to the field of wireless communications, and can reduce handover signaling and improve a handover success rate. The method of the present application mainly includes: receiving measurement configuration information sent by a control node, where the measurement configuration information includes a list of first-type cells, the type of first-type cells, a list of second-type cells, the type of second-type cells, hierarchical cell structure (HCS) priorities, a frequency of first-type cells, or a dedicated parameter for evaluating an event trigger threshold; detecting cell signal quality or signal strength of a cell; and determining, according to the cell signal quality or signal strength and the measurement configuration information, whether to report an event or a measurement result to the control node. The present application is mainly used in a process of mobility management.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Patent ApplicationNo. PCT/CN2013/073130, filed on Mar. 25, 2013, which claims priority toInternational Application No. PCT/CN2012/081684, filed on Sep. 20, 2012,both of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present application relates to the field of wireless communications,and in particular, to a measurement control method, a user equipment, acontrol node, and a system.

BACKGROUND

The field of wireless communications is faced with pressure of explosivegrowth of data services. To increase a network capacity and reducetransmission costs, the industry has proposed a heterogeneous network(Hetnet) technology. A Hetnet is formed by cells of different sizes anddifferent types, including macro cells and small cells. The small cellsinclude cells in various forms such as a micro cell, a pico cell, afemto cell, and a remote radio head (RRH). In an area with densetraffic, deploying more small cells may effectively increase a networkcapacity in the area. In addition, because sizes of the small cells aresmall, and capital expenditures (CAPEX) and operating expenses (OPEX) ofthe small cells are both low, the Hetnet attracts attention of manyoperators, and is a major direction of wireless network evolution.

In the prior art, when small cells and macro cells are deployed on asame frequency, to reduce interference to a neighboring cell in an areain which coverage of a macro cell overlaps coverage of a small cell, auser equipment (UE) in a software handover area may add in advance theneighboring cell to an active set; in addition, cells in the active setmay also be convenient for access of the UE, and there are relativelyfew handover signaling overheads.

In a process of implementing the foregoing interference coordination,the applicant finds that the prior art has at least the followingproblem: When the UE moves from a center of the small cell to an edge,signals of the small cell are attenuated abruptly, while signals of themacro cell become stronger slowly, and consequently, the UE cannot behanded over to the macro cell in time; in addition, in dense deploymentof small cells, the UE may be frequently handed over between cells,resulting in a lot of handover signaling overheads.

SUMMARY

Embodiments of the present application provide a measurement controlmethod, a user equipment, a control node, and a system, which can reducehandover signaling and improve a handover success rate.

A first aspect of the present application provides a measurement controlmethod, including: receiving measurement configuration information sentby a control node, where the measurement configuration informationincludes a list of first-type cells, the type of first-type cells, alist of second-type cells, the type of second-type cells, hierarchicalcell structure (HCS) priorities, a frequency of first-type cells, or adedicated parameter for evaluating an event trigger threshold; detectingcell signal quality or signal strength of a cell; and determining,according to the cell signal quality or signal strength and themeasurement configuration information, whether to report an event or ameasurement result to the control node.

According to the first aspect, in a first possible implementationmanner, the determining, according to the cell signal quality or signalstrength and the measurement configuration information, whether toreport an event or a measurement result to the control node includes:

if a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset, skipping reporting an event 1b of the first-type cell, or skippingusing a measurement result of the second-type cell to affect eventevaluation of the first-type cell, where the event 1b of the first-typecell is that signal quality or signal strength of the first-type cell islower than a predetermined criterion; or

if only a first-type cell indicated by the measurement configurationinformation exists in the active set, when cell signal quality or signalstrength of the first-type cell meets an event 1b trigger threshold,reporting an event 1b of the first-type cell, or using a measurementresult of a second-type cell to affect event evaluation of thefirst-type cell, so that the cell is removed from the active setaccording to an active set update message sent by the control node; or

if a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in the active set, skipping reporting an event 1bof the cell with the first HCS priority, or skipping using a measurementresult of the cell with the second HCS priority to affect eventevaluation of the cell with the first HCS priority; or

if only a cell with the first HCS priority indicated by the measurementconfiguration information exists in the active set, when cell signalquality or signal strength of the cell with the first HCS priority meetsan event 1b trigger threshold, reporting an event 1b of the cell withthe first HCS priority, or using a measurement result of a cell with thesecond HCS priority to affect event evaluation of the cell with thefirst HCS priority, so that the cell is removed from the active setaccording to an active set update message sent by the control node.

With reference to the first aspect or the first possible implementationmanner, in a second possible implementation manner, the determining,according to the cell signal quality or signal strength and themeasurement configuration information, whether to report an event or ameasurement result to the control node includes:

if a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in the activeset, and an optimal cell or a serving cell is the second-type cell,skipping reporting an event 1b of the first-type cell, or skipping usinga measurement result of the second-type cell to affect event evaluationof the first-type cell; or

if an optimal cell or a serving cell is a first-type cell indicated bythe measurement configuration information, when cell signal quality orsignal strength of a first-type cell other than the optimal cell orserving cell meets an event 1b trigger threshold, reporting an event 1bof the first-type cell other than the optimal cell or serving cell, orusing a measurement result of a second-type cell to affect eventevaluation of the first-type cell; or

if a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in the active set, and an optimal cell or a servingcell is the cell with the second HCS priority, skipping reporting anevent 1b of the cell with the first HCS priority, or skipping using ameasurement result of the cell with the second HCS priority to affectevent evaluation of the cell with the first HCS priority; or

if an optimal cell or a serving cell is a cell with the first HCSpriority indicated by the measurement configuration information, whencell signal quality or signal strength of another cell with the firstHCS priority than the optimal cell or serving cell meets an event 1btrigger threshold, reporting an event 1b of the another cell with thefirst HCS priority than the optimal cell or serving cell, or using ameasurement result of a cell with the second HCS priority to affectevent evaluation of the cell with the first HCS priority.

With reference to the first aspect or the first possible implementationmanner or the second possible implementation manner, in a third possibleimplementation manner, the determining, according to the cell signalquality or signal strength and the measurement configurationinformation, whether to report an event or a measurement result to thecontrol node includes:

triggering reporting of the event to the control node according to theevent trigger threshold and the cell signal quality or signal strengthof the cell, so that the control node sends an active set update messageto a user equipment (UE) according to the received event, where thededicated parameter for evaluating the event trigger threshold is usedto evaluate the event trigger threshold.

With reference to the first aspect or the first possible implementationmanner to the third possible implementation manner, in a fourth possibleimplementation manner, the dedicated parameter for evaluating the eventtrigger threshold includes: a relative dedicated offset for evaluatingthe event trigger threshold or an absolute dedicated parameter forevaluating the event trigger threshold; and

when a new relative dedicated offset is received, the UE obtains anabsolute evaluation parameter by calculation according to an initialevaluation parameter and the new relative dedicated offset, and uses theabsolute evaluation parameter obtained by calculation to evaluate theevent trigger threshold; or when a new absolute filter coefficient isreceived, directly uses the new absolute filter coefficient to evaluatethe event trigger threshold.

With reference to the first aspect or the first possible implementationmanner to the fourth possible implementation manner, in a fifth possibleimplementation manner, the dedicated parameter for evaluating the eventtrigger threshold includes one or more of the following parameters: acell individual offset CIO, a hysteresis, a weight, a reporting range,and duration meeting an event trigger condition.

With reference to the first aspect or the first possible implementationmanner to the fifth possible implementation manner, in a sixth possibleimplementation manner, the determining, according to the cell signalquality or signal strength and the measurement configurationinformation, whether to report an event or a measurement result to thecontrol node includes:

if the cell is a first-type cell or a cell with the first HCS priorityindicated by the measurement configuration information, preferentiallymeasuring the cell or preferentially reporting the measurement result ofthe cell to the control node.

A second aspect of the present application further provides ameasurement control method, including:

receiving a dedicated filter coefficient sent by a control node;

detecting cell signal quality or signal strength of a cell;

calculating a filtered measurement result according to the dedicatedfilter coefficient of the cell and the cell signal quality or signalstrength; and

reporting the filtered measurement result to the control node.

With reference to the second aspect, in a first possible implementationmanner, the dedicated filter coefficient includes: a relative filtercoefficient, or an absolute filter coefficient; and when the relativefilter coefficient is received, the absolute filter coefficient isobtained by calculation according to an initial filter coefficient andthe relative filter coefficient, and the absolute filter coefficientobtained by calculation is used to calculate the measurement result; orwhen the absolute filter coefficient is received, the absolute filtercoefficient is directly used to calculate the measurement result.

With reference to the second aspect or the first possible implementationmanner, in a second possible implementation manner, when an optimal cellor a serving cell is a first-type cell or a cell with the first HCSpriority, the dedicated filter coefficient has a positive offsetrelative to an existing filter coefficient; or

when an optimal cell or a serving cell is a second-type cell or a cellwith the second HCS priority, the dedicated filter coefficient has anegative offset relative to an existing filter coefficient.

A third aspect of the present application further provides a measurementcontrol method, including:

sending measurement configuration information to a user equipment (UE),where the measurement configuration information includes a list offirst-type cells, the type of first-type cells, a list of second-typecells, the type of second-type cells, hierarchical cell structure (HCS)priorities, a frequency of first-type cells, or a dedicated parameterfor evaluating an event trigger threshold;

if the UE determines, according to cell signal quality or signalstrength and the measurement configuration information, to report anevent or a measurement result, receiving the event or the measurementresult reported by the UE; and

sending an active set update message to the UE according to the event ormeasurement result.

According to the third aspect, in a first possible implementationmanner, the measurement configuration information includes a list offirst-type cells, the type of first-type cells, a list of second-typecells, the type of second-type cells, HCS priorities, a frequency offirst-type cells, or a dedicated parameter for evaluating an eventtrigger threshold.

A fourth aspect of the present application provides a measurementcontrol method, including:

sending a dedicated filter coefficient to a user equipment (UE); and

receiving a filtered measurement result reported by the UE, where thefiltered measurement result is obtained by calculation according to thededicated filter coefficient and cell signal quality or signal strength.

According to the fourth aspect, in a first possible implementationmanner, the dedicated filter coefficient includes: a relative filtercoefficient or an absolute filter coefficient.

With reference to the fourth aspect or the first possible implementationmanner, in a second possible implementation manner, the sending adedicated filter coefficient to a user equipment (UE) includes:

when an optimal cell or a serving cell of the UE is a first-type cell ora cell with the first HCS priority, sending, to the UE, a dedicatedfilter coefficient that has a positive offset relative to an existingfilter coefficient; or

when an optimal cell or a serving cell of the UE is a second-type cellor a cell with the second HCS priority, sending, to the UE, a dedicatedfilter coefficient that has a negative offset relative to an existingfilter coefficient.

A fifth aspect of the present application provides a measurement controlmethod, including:

receiving an event 1b of a cell reported by a user equipment (UE), wherethe event 1b of the cell is that signal quality or signal strength ofthe cell is lower than a predetermined criterion; and

determining, according to measurement configuration information and theevent 1b, whether to send an active set update message to the UE, wherethe measurement configuration information includes a list of first-typecells, the type of first-type cells, a list of second-type cells, thetype of second-type cells, hierarchical cell structure (HCS) priorities,a frequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

With reference to the fifth aspect, in a first possible implementationmanner, the determining, according to measurement configurationinformation and the event 1b, whether to send an active set updatemessage to the UE includes:

if a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, skipping sending an active set update message forremoving the first-type cell; or

if only a first-type cell indicated by the measurement configurationinformation exists in an active set of the UE, after an event 1b of thefirst-type cell reported by the UE is received, sending, to the UE, anactive set update message for removing the first-type cell; or

if a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set of the UE, skipping sending anactive set update message for removing the cell with the first HCSpriority; or

if only a cell with the first HCS priority indicated by the measurementconfiguration information exists in an active set of the UE, after anevent 1b that is of the cell with the first HCS priority and reported bythe UE is received, sending, to the UE, an active set update message forremoving the cell with the first HCS priority.

With reference to the fifth aspect or the first possible implementationmanner, in a second possible implementation manner, the determining,according to measurement configuration information and the event 1b,whether to send an active set update message to the UE includes:

if a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, and an optimal cell or a serving cell is the second-typecell, skipping sending, to the UE, an active set update message forremoving the first-type cell; or

if an optimal cell or a serving cell of the UE is a first-type cellindicated by the measurement configuration information, when an event 1bthat is of a first-type cell other than the optimal cell or a servingcell and reported by the UE is received, sending an active set updatemessage for removing the first-type cell; or

if a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set of the UE, and an optimal cell ora serving cell is the cell with the second HCS priority, skippingsending, to the UE, an active set update message for removing the cellwith the first HCS priority; or

if an optimal cell or a serving cell of the UE is a cell with the firstHCS priority indicated by the measurement configuration information,when an event 1b that is of a cell with the first HCS priority otherthan the optimal cell or serving cell and reported by the UE isreceived, sending an active set update message for removing the cellwith the first HCS priority than the optimal cell or serving cell.

A sixth aspect of the present application provides a user equipment(UE), including:

a receiving unit, configured to receive measurement configurationinformation sent by a control node, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold;

a detecting unit, configured to detect cell signal quality or signalstrength of a cell; and

a determining unit, configured to determine, according to the cellsignal quality or signal strength detected by the detecting unit and themeasurement configuration information received by the receiving unit,whether to report an event or a measurement result to the control node.

With reference to the sixth aspect, in a first possible implementationmanner, the determining unit includes:

a first determining module, configured to: when a first-type cell and asecond-type cell that are indicated by the measurement configurationinformation received by the receiving unit simultaneously exist in anactive set, skip reporting an event 1b of the first-type cell, orskipping using a measurement result of the second-type cell to affectevent evaluation of the first-type cell; and

a second determining module, configured to: when only a first-type cellindicated by the measurement configuration information received by thereceiving unit exists in the active set, and cell signal quality orsignal strength of the first-type cell meets an event 1b triggerthreshold, report an event 1b of the first-type cell, or use ameasurement result of a second-type cell to affect event evaluation ofthe first-type cell, so that the cell is removed from the active setaccording to an active set update message sent by the control node.

With reference to the sixth aspect or the first possible implementationmanner, in a second possible implementation manner, the determining unitincludes:

a third determining module, configured to: when a first-type cell and asecond-type cell that are indicated by the measurement configurationinformation received by the receiving unit simultaneously exist in anactive set, and an optimal cell or a serving cell is the second-typecell, skip reporting an event 1b of the first-type cell, or skippingusing a measurement result of the second-type cell to affect eventevaluation of the first-type cell; or when a cell with the first HCSpriority and a cell with the second HCS priority that are indicated bythe measurement configuration information simultaneously exist in anactive set, and an optimal cell or a serving cell is the cell with thesecond HCS priority, skip reporting an event 1b of the cell with thefirst HCS priority, or a measurement result of the cell of the secondHCS priority does not affect event evaluation of the cell with the firstHCS priority; and

a fourth determining module, configured to: when an optimal cell or aserving cell is a first-type cell or a cell with the first HCS priorityindicated by the measurement configuration information received by thereceiving unit, and cell signal quality or signal strength of afirst-type cell or a cell with the first HCS priority other than theoptimal cell or serving cell meets an event 1b trigger threshold, reportan event 1b of the first-type cell or the cell of the first HCS priorityother than the optimal cell or serving cell, or use a measurement resultof a second-type cell to affect event evaluation of the first-type cell.

With reference to the sixth aspect or the first possible implementationmanner or the second possible implementation manner, in a third possibleimplementation manner, the determining unit includes:

a fifth determining module, configured to trigger reporting of the eventto the control node according to the event trigger threshold and thecell signal quality or signal strength of the cell, so that the controlnode sends an active set update message to the UE according to thereceived event; where

the measurement configuration information received by the receiving unitincludes the dedicated parameter for evaluating the event triggerthreshold.

With reference to the sixth aspect or the first possible implementationmanner to the third possible implementation manner, in a fourth possibleimplementation manner, the determining unit includes:

a sixth determining module, configured to preferentially report themeasurement result of the cell to the control node when the cell is afirst-type cell indicated by the measurement configuration informationreceived by the receiving unit.

A seventh aspect of the present application further provides a userequipment (UE), including:

a receiving unit, configured to receive a dedicated filter coefficientsent by a control node;

a detecting unit, configured to detect cell signal quality or signalstrength of a cell;

a calculating unit, configured to calculate a filtered measurementresult according to the dedicated filter coefficient of the cellreceived by the receiving unit and the cell signal quality or signalstrength detected by the detecting unit; and

a sending unit, configured to report the filtered measurement resultobtained by the calculating unit by calculation to the control node.

An eighth aspect of the present application further provides a controlnode, including:

a first sending unit, configured to send measurement configurationinformation to a user equipment (UE), where the measurementconfiguration information includes a list of first-type cells, the typeof first-type cells, a list of second-type cells, the type ofsecond-type cells, hierarchical cell structure (HCS) priorities, afrequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold;

a receiving unit, configured to: when the UE determines, according tocell signal quality or signal strength and the measurement configurationinformation, to report an event or a measurement result, receive theevent or the measurement result reported by the UE; and

a second sending unit, configured to send an active set update messageto the UE according to the event or the measurement result received bythe receiving unit.

A ninth aspect of the present application further provides a controlnode, including:

a sending unit, configured to send a dedicated filter coefficient to auser equipment (UE); and

a receiving unit, configured to receive a filtered measurement resultreported by the UE, where the filtered measurement result is obtained bycalculation according to the dedicated filter coefficient and cellsignal quality or signal strength.

With reference to the ninth aspect, in a first possible implementationmanner, the sending unit includes:

a first sending unit, configured to: when an optimal cell or a servingcell of the UE is a first-type cell or a cell with the first HCSpriority, send, to the UE, a dedicated filter coefficient that has apositive offset relative to an existing filter coefficient; and

a second sending unit, configured to: when an optimal cell or a servingcell of the UE is a second-type cell or a cell with the second HCSpriority, send, to the UE, a dedicated filter coefficient that has anegative offset relative to an existing filter coefficient.

A tenth aspect of the present application provides a control node,including:

a receiving unit, configured to receive an event 1b of a cell reportedby a user equipment (UE); and

a determining unit, configured to determine, according to measurementconfiguration information and the event 1b received by the receivingunit, whether to send an active set update message to the UE, where themeasurement configuration information includes a list of first-typecells, the type of first-type cells, a list of second-type cells, thetype of second-type cells, hierarchical cell structure (HCS) priorities,a frequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

With reference to the tenth aspect, in a first possible implementationmanner, the determining unit includes:

a seventh determining unit, configured to: when a first-type cell and asecond-type cell that are indicated by the measurement configurationinformation simultaneously exist in an active set of the UE, skipsending an active set update message for removing the first-type cell;or when a cell with the first HCS priority and a cell with the secondHCS priority that are indicated by the measurement configurationinformation simultaneously exist in an active set of the UE, skipsending an active set update message for removing the cell with thefirst HCS priority; and

an eighth determining unit, configured to: when only a first-type cellor a cell with the first HCS priority indicated by the measurementconfiguration information exists in the active set of the UE, after anevent 1b of the first-type cell reported by the UE is received, send, tothe UE, an active set update message for removing the first-type cell orthe cell with the first HCS priority.

With reference to the tenth aspect or the first possible implementationmanner, in a second possible implementation manner, the determining unitincludes a ninth determining unit, configured to: when a first-type celland a second-type cell that are indicated by the measurementconfiguration information simultaneously exist in an active set of theUE, and an optimal cell or a serving cell is the second-type cell, skipsending, to the UE, an active set update message for removing thefirst-type cell; or when a cell with the first HCS priority and a cellwith the second HCS priority that are indicated by the measurementconfiguration information simultaneously exist in an active set, and anoptimal cell or a serving cell is the cell with the second HCS priority,skip reporting an event 1b of the cell with the first HCS priority; and

a tenth determining unit, configured to: when an optimal cell or aserving cell of the UE is a first-type cell or a cell with the first HCSpriority indicated by the measurement configuration information, and anevent 1b that is of a first-type cell or a cell with the first HCSpriority other than the optimal cell or serving cell and reported by theUE is received, send an active set update message for removing thefirst-type cell or the cell with the first HCS priority than the optimalcell or serving cell.

An eleventh aspect of the present application provides a measurementcontrol system, including a user equipment (UE) and a control node,where

the UE is configured to: receive measurement configuration informationsent by the control node, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold; detect cell signal quality or signal strength of a cell; anddetermine, according to the cell signal quality or signal strength andthe measurement configuration information, whether to report an event ora measurement result of the cell to the control node; and the controlnode is configured to: send the measurement configuration information tothe UE, where the measurement configuration information includes thelist of the first-type cells, the type of the first-type cells, the listof the second-type cells, the type of the second-type cells, thehierarchical cell structure (HCS) priorities, the frequency of thefirst-type cells, or the dedicated parameter for evaluating the eventtrigger threshold; if the UE determines, according to the cell signalquality or signal strength and the measurement configurationinformation, to report the event or measurement result, receive theevent or the measurement result reported by the UE; and send an activeset update message to the UE according to the event or measurementresult;

alternatively, the UE is configured to: receive a dedicated filtercoefficient sent by the control node; detect cell signal quality orsignal strength of a cell; calculate a filtered measurement resultaccording to the dedicated filter coefficient of the cell and the cellsignal quality or signal strength; and report the filtered measurementresult to the control node; and the control node is configured to: sendthe dedicated filter coefficient to the UE; and receive the filteredmeasurement result reported by the UE, where the filtered measurementresult is obtained by calculation according to the dedicated filtercoefficient and the cell signal quality or signal strength;

alternatively, the UE is configured to: report the event 1b of the cellto the control node according to detected cell signal quality or signalstrength, and for the first-type cells indicated by the measurementconfiguration information, skip expecting the control node to send anactive set update message; and the control node is configured to:receive an event 1b of a cell reported by the UE, and determine,according to measurement configuration information and the event 1b,whether to send an active set update message to the UE, where themeasurement configuration information includes a list of first-typecells, the type of first-type cells, a list of second-type cells, thetype of second-type cells, hierarchical cell structure (HCS) priorities,a frequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

A twelfth aspect of the present application further provides a userequipment (UE), including:

a receiver, configured to receive measurement configuration informationsent by a control node, where the measurement configuration informationincludes a list of first-type cells, the type of first-type cells, alist of second-type cells, the type of second-type cells, hierarchicalcell structure (HCS) priorities, a frequency of first-type cells, or adedicated parameter for evaluating an event trigger threshold;

a processor, configured to detect cell signal quality or signal strengthof a cell; and

a transmitter, configured to determine, according to the cell signalquality or signal strength detected by the processor and the measurementconfiguration information received by the receiver, whether to report anevent or a measurement result to the control node.

With reference to the twelfth aspect, in a first possible implementationmanner, the transmitter is further configured to:

when a first-type cell and a second-type cell that are indicated by themeasurement configuration information received by the receiversimultaneously exist in an active set, skip reporting an event 1b of thefirst-type cell, or a measurement result of the second-type cell doesnot affect event evaluation of the first-type cell; or

when only a first-type cell indicated by the measurement configurationinformation received by the receiver exists in the active set, and cellsignal quality or signal strength of the first-type cell meets an event1b trigger threshold, report an event 1b of the first-type cell, or usea measurement result of a second-type cell to affect event evaluation ofthe first-type cell, so that the cell is removed from the active setaccording to an active set update message sent by the control node; or

when a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationreceived by the receiver simultaneously exist in the active set, skipreporting an event 1b of the cell with the first HCS priority, orskipping using a measurement result of the cell with the second HCSpriority to affect event evaluation of the cell with the first HCSpriority; or

when only a cell with the first HCS priority indicated by themeasurement configuration information received by the receiver exists inthe active set, and cell signal quality or signal strength of the cellwith the first HCS priority meets an event 1b trigger threshold, reportan event 1b of the cell with the first HCS priority, or use ameasurement result of a cell with the second HCS priority to affectevent evaluation of the cell with the first HCS priority, so that thecell is removed from the active set according to an active set updatemessage sent by the control node.

With reference to the twelfth aspect or the first possibleimplementation manner, in a second possible implementation manner, thetransmitter is further configured to:

when a first-type cell and a second-type cell that are indicated by themeasurement configuration information received by the receiversimultaneously exist in the active set, and an optimal cell or a servingcell is the second-type cell, skip reporting an event 1b of thefirst-type cell, or a measurement result of the second-type cell doesnot affect event evaluation of the first-type cell; or

when an optimal cell or a serving cell is a first-type cell indicated bythe measurement configuration information received by the receiver, andcell signal quality or signal strength of a first-type cell other thanthe optimal cell or serving cell meets an event 1b trigger threshold,report an event 1b of the first-type cell other than the optimal cell orthe serving cell, or use a measurement result of a second-type cell toaffect event evaluation of the first-type cell; or

when a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationreceived by the receiver simultaneously exist in the active set, and anoptimal cell or a serving cell is the cell with the second HCS priority,skip reporting an event 1b of the cell with the first HCS priority, orskipping using a measurement result of the cell with the second HCSpriority to affect event evaluation of the cell with the first HCSpriority; or

when an optimal cell or a serving cell is a cell with the first HCSpriority indicated by the measurement configuration information receivedby the receiver, and cell signal quality or signal strength of anothercell with the first HCS priority than the optimal cell or serving cellmeets an event 1b trigger threshold, report an event 1b of the cell withthe first HCS priority other than the optimal cell or serving cell, oruse a measurement result of a cell with the second HCS priority toaffect event evaluation of the cell with the first HCS priority.

With reference to the twelfth aspect or the first possibleimplementation manner or the second possible implementation manner, in athird possible implementation manner, the transmitter is furtherconfigured to:

trigger reporting of the event to the control node according to theevent trigger threshold and the cell signal quality or signal strengthof the cell, so that the control node sends an active set update messageto the UE according to the received event; where

the measurement configuration information received by the receiverincludes the dedicated parameter for evaluating the event triggerthreshold.

With reference to the twelfth aspect or the first possibleimplementation manner to the third possible implementation manner, in afourth possible implementation manner, the transmitter is furtherconfigured to:

preferentially report the measurement result of the cell to the controlnode when the cell is a first-type cell indicated by the measurementconfiguration information received by the receiver.

A thirteenth aspect of the present application further provides a userequipment (UE), including:

a receiver, configured to receive a dedicated filter coefficient sent bya control node;

a processor, configured to detect cell signal quality or signal strengthof a cell, and calculate a filtered measurement result according to thededicated filter coefficient of the cell received by the receiver andthe detected cell signal quality or signal strength; and

a transmitter, configured to report the filtered measurement resultobtained by the processor by calculation to the control node.

A fourteenth aspect of the present application provides a control node,including:

a transmitter, configured to send measurement configuration informationto a user equipment (UE), where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold; and

a receiver, configured to: when the UE determines, according to cellsignal quality or signal strength and the measurement configurationinformation, to report an event or a measurement result, receive theevent or the measurement result reported by the UE; where

the transmitter is further configured to send an active set updatemessage to the UE according to the event or the measurement resultreceived by the receiver.

A fifteenth aspect of the present application provides a control node,including:

a transmitter, configured to send a dedicated filter coefficient to auser equipment (UE); and

a receiver, configured to receive a filtered measurement result reportedby the UE, where the filtered measurement result is obtained bycalculation according to the dedicated filter coefficient and cellsignal quality or signal strength.

With reference to the fifteenth aspect of the present application, in apossible implementation manner, the transmitter is further configuredto:

when an optimal cell or a serving cell of the UE is a first-type cell ora cell with the first HCS priority, send, to the UE, a dedicated filtercoefficient that has a positive offset relative to an existing filtercoefficient; or

when an optimal cell or a serving cell of the UE is a second-type cellor a cell with the second HCS priority, send, to the UE, a dedicatedfilter coefficient that has a negative offset relative to an existingfilter coefficient.

A sixteenth aspect of the present application further provides a controlnode, including:

a receiver, configured to receive an event 1b of a cell reported by auser equipment (UE); and

a transmitter, configured to determine, according to measurementconfiguration information and the event 1b received by the receiver,whether to send an active set update message to the UE, where themeasurement configuration information includes a list of first-typecells, the type of first-type cells, a list of second-type cells, thetype of second-type cells, hierarchical cell structure (HCS) priorities,a frequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

With reference to the sixteenth aspect, in a first possibleimplementation manner, the transmitter is further configured to:

when a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, skip sending an active set update message for removingthe first-type cell; or

when only a first-type cell indicated by the measurement configurationinformation exists in an active set of the UE, after an event 1b of thefirst-type cell reported by the UE is received, send, to the UE, anactive set update message for removing the first-type cell; or

when a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set of the UE, skip sending an activeset update message for removing the cell with the first HCS priority; or

when only a cell with the first HCS priority indicated by themeasurement configuration information exists in an active set of the UE,after an event 1b that is of the cell with the first HCS priority andreported by the UE is received, send, to the UE, an active set updatemessage for removing the cell with the first HCS priority.

With reference to the sixteenth aspect or the first possibleimplementation manner, in a second possible implementation manner, thetransmitter is further configured to:

when a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, and an optimal cell or a serving cell is the second-typecell, skip sending, to the UE, an active set update message for removingthe first-type cell; or

when an optimal cell or a serving cell of the UE is a first-type cellindicated by the measurement configuration information, and an event 1bthat is of a first-type cell other than the optimal cell or serving celland reported by the UE is received, send an active set update messagefor removing the first-type cell; or

when a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set of the UE, and an optimal cell ora serving cell is the cell with the second HCS priority, skip sending,to the UE, an active set update message for removing the cell with thefirst HCS priority; or

when an optimal cell or a serving cell of the UE is a cell with thefirst HCS priority indicated by the measurement configurationinformation, and an event 1b that is of a cell with the first HCSpriority other than the optimal cell or serving cell and reported by theUE is received, send an active set update message for removing the cellwith the first HCS priority than the optimal cell or serving cell.

A seventeenth aspect of the present application further provides a linkmanagement method, including:

sending a link management indication to a base station, so that the basestation no longer sends a radio link failure indication to a controlnode or sends a radio link failure indication to a control node for onlya limited number of times.

An eighteenth aspect of the present application further provides a linkmanagement method, including:

receiving a link management indication sent by a control node, where thelink management indication is used to instruct the base station to nolonger send a radio link failure indication to the control node or tosend a radio link failure indication to the control node for only alimited number of times.

A nineteenth aspect of the present application further provides a linkmanagement method, including:

receiving a synchronization detection parameter sent by a control node,where the synchronization detection parameter includes at least onepiece of the following information: the number of synchronizationprimitives, the number of out-of-synchronization primitives, and afailure detection timer; and

performing uplink synchronization detection according to thesynchronization detection parameter.

A twentieth aspect of the present application further provides a linkmanagement method, including:

sending a synchronization detection parameter to a base station, wherethe synchronization detection parameter includes at least one piece ofthe following information: the number of synchronization primitives, thenumber of out-of-synchronization primitives, and a failure detectiontimer, so that the base station performs uplink synchronizationdetection according to the synchronization detection parameter.

A twenty-first aspect of the present application further provides ameasurement control method, including:

receiving measurement configuration information sent by a control node,where the measurement configuration information includes that a signalmeasurement value of a second-type cell does not affect event evaluationof a first-type cell, and/or that a signal measurement value of asecond-type cell affects event evaluation of a third-type cell; and

determining, according to a signal measurement value of the first-typecell and the measurement configuration information, whether to report anevent or a measurement result to the control node.

With reference to the twenty-first aspect of the present application, ina first possible implementation manner, a form of the second-type cell,first-type cell, and third-type cell indicated by the measurementconfiguration information may be a form of a single cell, or may be aform of a cell list, so that whether measurement reporting of multiplecells affects each other may be configured simultaneously; where

the event may be an event 1a or an event 1b;

in evaluation of the event 1a, when only the second-type cell exists inan active set, during event evaluation of the first-type cell, a UE mayalso not use the signal measurement value of the second-type cell toaffect event evaluation of the first-type cell, but use the signalmeasurement value of the second-type cell to affect event evaluation ofthe third-type cell;

specifically, for example, the first-type cell is a macro cell, thesecond-type cell is a small cell and is a cell in the active set, andthe third-type cell is a small cell; the first-type cell and thethird-type cell may be cells in the active set, a monitored cell, or adetected cell; in this case, when the UE evaluates an event 1a of thefirst-type cell, the signal measurement value of the second-type cell isnot considered, and when the terminal evaluates an event 1a of thethird-type cell, the signal measurement value of the second-type cell isconsidered.

With reference to the twenty-first aspect of the present application orthe first possible implementation manner of the twenty-first aspect, ina second possible implementation manner, the determining, according to asignal measurement value of the first-type cell and the measurementconfiguration information, whether to report an event or a measurementresult to the control node includes:

triggering reporting of the event to the control node according to anevent trigger threshold and cell signal quality or signal strength ofthe first-type cell, where a dedicated parameter for evaluating theevent trigger threshold is used to evaluate the event trigger threshold.

A twenty-second aspect of the present application further provides auser equipment (UE), including:

a receiver, configured to receive measurement configuration informationsent by a control node, where the measurement configuration informationincludes that a signal measurement value of a second-type cell does notaffect event evaluation of a first-type cell, and/or that a signalmeasurement value of a second-type cell affects event evaluation of athird-type cell; and

a processor, configured to determine, according to a signal measurementvalue of the first-type cell and the measurement configurationinformation received by the receiver, whether to report an event or ameasurement result to the control node.

With reference to the twenty-second aspect of the present application,in a first possible implementation manner, the processor is furtherconfigured to:

trigger reporting of the event to the control node according to an eventtrigger threshold and cell signal quality or signal strength of thefirst-type cell, where a dedicated parameter for evaluating the eventtrigger threshold is used to evaluate the event trigger threshold.

A twenty-third aspect of the present application provides a measurementcontrol method, including:

configuring, by a control node, measurement configuration information,where the measurement configuration information includes that a signalmeasurement value of a second-type cell does not affect event evaluationof a first-type cell, and/or that a signal measurement value of asecond-type cell affects event evaluation of a third-type cell; and

sending the measurement configuration information to a user equipment(UE), so that the UE determines, according to a signal measurement valueof the first-type cell and the measurement configuration information,whether to report an event or a measurement result to the control node.

A twenty-fourth aspect of the present application further provides acontrol node, including:

a memory, configured to store measurement configuration information,where the measurement configuration information includes that a signalmeasurement value of a second-type cell does not affect event evaluationof a first-type cell, and/or that a signal measurement value of asecond-type cell affects event evaluation of a third-type cell; and

a transmitter, configured to send the measurement configurationinformation stored in the memory to a user equipment (UE), so that theUE determines, according to a signal measurement value of the first-typecell and the measurement configuration information, whether to report anevent or a measurement result to the control node.

According to the measurement control method, the user equipment, thecontrol node, and the system provided by the embodiments of the presentapplication, whether to report an event or a measurement result isdetermined according to measurement configuration information anddetected cell signal quality or signal strength. In comparison with theprior art in which events or measurement results are uniformly reportedaccording to cell signal quality or signal strength, non-reporting ordeferred reporting or advance reporting of an event or a measurementresult of a first-type cell may be controlled according to arequirement, so that the first-type cell is retained in an active set ofthe UE as far as possible. Thereby, a handover signaling overhead forhanding over to the first-type cell may be reduced, handing over to thefirst-type cell in time is implemented, and a handover failure isavoided.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the presentapplication or in the prior art more clearly, the following brieflyintroduces the accompanying drawings required for describing theembodiments. Apparently, the accompanying drawings in the followingdescription merely show some embodiments of the present application, anda person of ordinary skill in the art may still derive other drawingsfrom these accompanying drawings without creative efforts.

FIG. 1 is a flowchart of a measurement control method according to anembodiment of the present application;

FIG. 2 is a flowchart of a measurement control method according toanother embodiment of the present application;

FIG. 3 is a flowchart of a measurement control method according toanother embodiment of the present application;

FIG. 4 is a schematic diagram of composition of a user equipment (UE)according to another embodiment of the present application;

FIG. 5 is a schematic diagram of composition of another UE according toanother embodiment of the present application;

FIG. 6 is a schematic diagram of composition of a user equipment (UE)according to another embodiment of the present application;

FIG. 7 is a schematic diagram of composition of another UE according toanother embodiment of the present application;

FIG. 8 is a schematic diagram of composition of a control node accordingto another embodiment of the present application;

FIG. 9 is a schematic diagram of composition of a control node accordingto another embodiment of the present application;

FIG. 10 is a schematic diagram of composition of a control nodeaccording to another embodiment of the present application; and

FIG. 11 is a schematic diagram of composition of a measurement controlsystem according to another embodiment of the present application.

DESCRIPTION OF EMBODIMENTS

The following clearly describes the technical solutions in theembodiments of the present application with reference to theaccompanying drawings in the embodiments of the present application.Apparently, the described embodiments are merely some but not all of theembodiments of the present application. All other embodiments obtainedby a person of ordinary skill in the art based on the embodiments of thepresent application without creative efforts shall fall within theprotection scope of the present application.

Technologies described in this specification may be applied to variouscommunications systems, for example, current 2G and 3G communicationssystems and a next-generation communications system, for example, aglobal system for mobile communications (GSM) system, a code divisionmultiple access (CDMA) system, a time division multiple access (TDMA)system, a wideband code division multiple access (WCDMA) system, afrequency division multiple access (FDMA) system, an orthogonalfrequency-division multiple access (OFDMA) system, a single-carrier FDMA(SC-FDMA) system, a general packet radio service (GPRS) system, a longterm evolution (LTE) system, and other communications systems.

Various aspects are described in this specification with reference to auser equipment and/or a base station and/or a base station controller.

The user equipment may be a wireless terminal or a wired terminal. Thewireless terminal may refer to a device that provides a user with voiceand/or data connectivity, a handheld device with a radio connectionfunction, or another processing device connected to a radio modem. Thewireless terminal may communicate with one or more core networks througha radio access network (RAN). The wireless terminal may be a mobileterminal, such as a mobile phone (also referred to as a “cellular”phone) and a computer with a mobile terminal, for example, may be aportable, pocket-sized, handheld, computer built-in, or in-vehiclemobile apparatus, which exchanges voice and/or data with the radioaccess network. For example, it may be a device such as a personalcommunications service (PCS) phone, a cordless telephone set, a SessionInitiation Protocol (SIP) phone, a wireless local loop (WLL) station, ora personal digital assistant (PDA). The wireless terminal may also bereferred to as a system, a subscriber unit, a subscriber station, amobile station, a mobile terminal, a remote station, an access point, aremote terminal, an access terminal, a user terminal, a user agent, auser device, or a user equipment.

The base station (for example, an access point) may refer to a device incommunication with a wireless terminal via one or more sectors at an airinterface in an access network. The base station may be configured tomutually convert a received over-the-air frame and an IP packet andserve as a router between the wireless terminal and a rest portion ofthe access network, where the rest portion of the access network mayinclude an Internet protocol (IP) network. The base station may alsocoordinate attribute management of the air interface. For example, thebase station may be a base station (BTS) in GSM or the CDMA, may also bea base station (NodeB) in WCDMA, and may further be an evolved NodeB(NodeB, eNB, or e-NodeB, evolved Node B) in the LTE, which is notlimited in the present application.

The base station controller may be a base station controller (BSC) inGSM or CDMA, or a radio network controller (RNC) in WCDMA, which is notlimited in the present application.

In addition, the terms “system” and “network” may be usedinterchangeably in this specification. The term “and/or” in thisspecification describes only an association relationship for describingassociated objects and represents that three relationships may exist.For example, A and/or B may represent the following three cases: Only Aexists, both A and B exist, and only B exists. In addition, thecharacter “/” in this specification generally indicates an “or”relationship between the associated objects.

An embodiment of the present application provides a measurement controlmethod. As shown in FIG. 1, the method may include:

101. A user equipment (UE) receives measurement configurationinformation sent by a control node, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold.

For example, the measurement configuration information may be a list ofmacro cells, where a macro cell is considered as a first-type cell, anda small cell is considered as a second-type cell, while the UE may learncell types of neighboring cells.

For example, an event may be an event 1a or 1b. The event 1a means thatsignal quality or signal strength of a cell reaches or is higher than athreshold. The event 1b means that signal quality or signal strength ofa cell is lower than a threshold.

For example, the control node may be a base station controller or a flatbase station. In different application scenarios, the measurementconfiguration information may include a list of first-type cells, thetype of first-type cells, a list of second-type cells, the type ofsecond-type cells, hierarchical cell structure (HCS) priorities, afrequency of first-type cells, or a dedicated parameter for evaluatingthe event, or the like.

102. The UE detects cell signal quality or signal strength of a cell.

The UE detects cell signal quality or signal strength of a neighboringcell, and reports an event or a measurement result to the control nodeaccording to the signal quality or signal strength, for example, whenthe signal quality or signal strength is higher than a threshold,reports an event 1a to the control node. A difference in the embodimentof the present application is that the UE may further determine,according to the measurement configuration information, whether toexecute reporting; in another embodiment of the present invention, afterreporting, the UE does not expect an active set update message.

For example, the UE detects signal quality of neighboring cells, where aserving cell of the UE is a first-type cell (e.g. which is a macro cell)indicated by the measurement configuration information, and even ifsignal quality of the serving cell is lower than an event lb triggerthreshold, the UE does not report an event 1b to the control node;certainly, for a second-type cell (e.g. which is small cell) indicatedby the measurement configuration information, the UE normally reports anevent 1b. In another embodiment of the present invention, a serving cellof the UE is a first-type cell (e.g. which is macro cell) indicated bythe measurement configuration information, when signal quality of aserving cell is lower than an event 1b trigger threshold, the UE reportsan event 1b, but even if no active set update message sent by a controlnode is received in a time period, reporting of an event 1b of theserving cell is not changed to periodic event reporting.

103. The UE determines, according to the cell signal quality or signalstrength and the measurement configuration information, whether toreport an event or a measurement result of a first-type cell or a cellwith the first HCS priority to the control node.

Cells with the first HCS priority may be cells whose HCS priorities arelower than a level. Similarly, cells of the second HCS priority may becells whose HCS priorities are higher than a level. Alternatively, cellswith the first HCS priority may be a proportion of cells selected inascending order of priorities from neighboring cells detected by the UE;and cells of the second HCS priority may be other neighboring cells thanthe cells with the first HCS priority, or a proportion of cells selectedin descending order of priorities.

For example, according to a first-type cell or a cell with the first HCSpriority indicated by the measurement configuration information, whencell signal quality or signal strength meets an event trigger threshold,the UE may select to report an event or not to report an event. Inanother embodiment of the present invention, when cell signal quality orsignal strength meets an event trigger threshold, the UE may also reportan event, but for a first-type cell or a cell with the first HCSpriority indicated by the measurement configuration information, doesnot expect an active set update message for removing the first-type cellor the cell with the first HCS priority, that is, does not change eventreporting to periodic event reporting. In another embodiment of thepresent invention, according to a dedicated parameter for evaluating athreshold in the measurement configuration information, the UE may alsouse the threshold obtained by evaluation to trigger reporting of anevent, for example, when cell signal quality is lower than an event 1btrigger threshold obtained by evaluation by using the dedicatedparameter, trigger reporting of an event 1b. The measurement controlmethod provided by the present application includes but is not limitedto the methods enumerated in this embodiment.

In this embodiment, because the measurement configuration information isconfigured, reporting of an event or a measurement result may becontrolled. By taking measures such as skipping reporting an event 1b ofa first-type cell and increasing an event 1a trigger threshold of asecond-type cell, the first-type cell or a cell with the first HCSpriority is added to an active set in advance, and removing thefirst-type cell or the cell with the first HCS priority from the activeset is deferred. Thereby, the first-type cell or the cell with the firstHCS priority is retained in the active set as far as possible, handoversignaling required for handing over the UE to the first-type cell or thecell with the first HCS priority is reduced, and a problem of a failurein handing over to the first-type cell or the cell with the first HCSpriority is avoided.

It is understandable that, if the UE determines to report an event or ameasurement result to the control node, the method of this embodimentfurther includes subsequent steps 104 and 105; otherwise, if the UEdetermines not to report an event or a measurement result to the controlnode, the subsequent steps 104 and 105 may not need to be executed.

104. The control node receives the event or the measurement resultreported by the UE.

By using a determining result in step 103, the UE determines whether toreport the event or measurement result.

105. The control node sends an active set update message to the UEaccording to the event or measurement result.

For example, after receiving an event 1a, the control node may send anactive set update message to the UE to add a corresponding cell to theactive set of the UE. In another embodiment of the present invention,after receiving an event 1b, the control node may send an active setupdate message to the UE to remove a corresponding cell from the activeset of the UE. In another embodiment of the present invention, accordingto a measurement result reported by the UE, the control node may removea cell whose signal quality or signal strength is lower than apredetermined threshold from the active set of the UE, and add a cellwhose signal quality or signal strength is higher than a predeterminedthreshold to the active set of the UE.

By using the measurement control method provided by the embodiment ofthe present application, whether to report an event or a measurementresult is determined according to measurement configuration informationand detected cell signal quality or signal strength. In comparison withthe prior art in which events or measurement results are uniformlyreported according to cell signal quality or signal strength,non-reporting or deferred reporting or advance reporting of an event ora measurement result of a first-type cell may be controlled according toa requirement, so that an objective of deferring removing the first-typecell from an active set of a user equipment (UE) or adding in advance acorresponding cell to an active set of the UE is achieved. Thereby, ahandover signaling overhead for handing over to the first-type cell maybe reduced, handing over to the first-type cell in time is implemented,and a handover failure is avoided.

Further, optionally, in an implementation manner of the embodiment ofthe present application, a specific implementation method of step 103may be as follows:

103 a. If a first-type cell and a second-type cell that are indicated bythe measurement configuration information simultaneously exist in theactive set, skip reporting an event 1b of the first-type cell, or skipreporting an event 1a of the second-type cell.

In this implementation manner, the measurement configuration informationmay include a list of first-type cells, the type of first-type cells, alist of second-type cells, the type of second-type cells, or HCSpriorities, or the like. For example, the measurement configurationinformation may be a list of macro cells, where a macro cell isconsidered as a first-type cell, and a small cell is considered as asecond-type cell, while the UE may learn cell types of neighboringcells. In this manner, when the UE gradually approaches a small cellwithin coverage of a macro cell, signal quality or signal strength ofthe small cell increases drastically, while a change of signal qualityor signal strength of the macro cell tends to be smooth, andconsequently, the macro cell meets an event 1b trigger threshold.Therefore, to retain the macro cell in the active set as far aspossible, an event 1b of the macro cell may not be reported.

In addition, when a second-type cell meets an event 1a triggerthreshold, an event 1a of the second-type cell is not reported, so thatadding the second-type cell to the active set of the UE may be deferred.

Similarly, if a cell with the first HCS priority and a cell with thesecond HCS priority that are indicated by the measurement configurationinformation simultaneously exist in the active set, an event 1b of thecell with the first HCS priority is not reported. The first-type cellsand second-type cells may also be distinguished by using the list of thesecond-type cells. If the HCS priorities are used as measurementconfiguration information, cells whose priorities are lower than apredetermined level may be preset as first-type cells, and cells whosepriorities are higher than a predetermined level may be preset assecond-type cells. A person skilled in the art may indicate thefirst-type cells and second-type cells without creative efforts, whichis not further described in detail in the embodiments of the presentapplication.

103 b. If only a first-type cell indicated by the measurementconfiguration information exists in the active set, when cell signalquality or signal strength of the first-type cell meets an event 1btrigger threshold, report an event 1b of the first-type cell, so thatthe cell is removed from the active set according to an active setupdate message sent by the control node.

Similarly, if only a cell with the first HCS priority indicated by themeasurement configuration information exists in the active set, whencell signal quality or signal strength of the cell with the first HCSpriority meets an event 1b trigger threshold, an event 1b of the cellwith the first HCS priority is reported, so that the cell is removedfrom the active set according to an active set update message sent bythe control node.

If only first-type cells or cells with the first HCS priority exist inthe active set of the UE, that is, the UE is not within coverage of anysecond-type cell or cell with the second HCS priority, to save radiolink resources, a cell with higher signal quality or signal strength maybe selected from the multiple first-type cells or cells with the firstHCS priority. For example, only two first-type cells or cells with thefirst HCS priority exist in the active set of the UE. When either one ofthe two first-type cells or cells with the first HCS priority meets anevent 1b trigger threshold, an event 1b of the cell may be reported, sothat the control node sends an active set update message for removingthe cell to remove, from the active set, the first-type cell or the cellwith the first HCS priority whose signal quality or signal strength islower than a predetermined threshold. It should be noted that, for casesthat are not described in this implementation manner, a conventionalevent reporting procedure in the protocol may also be executed.

Optionally, in another implementation manner of the embodiment of thepresent application, a specific implementation method of step 103 mayalso be as follows:

103 c. If a first-type cell and a second-type cell that are indicated bythe measurement configuration information simultaneously exist in theactive set, and an optimal cell or a serving cell is the second-typecell, skip reporting an event 1b of the first-type cell.

In this implementation manner, the measurement configuration informationmay include a list of first-type cells, the type of first-type cells, alist of second-type cells, the type of second-type cells, or HCSpriorities, or the like. For example, the measurement configurationinformation may be a list of first-type cells, where the list is made upof multiple cell identities, and cells beyond the list are considered assecond-type cells. When the UE is within coverage of a first-type celland located in a center of a second-type cell (or the second-type cellis an optimal cell or a serving cell), signal quality or signal strengthof the first-type cell easily meets an event 1b trigger threshold.However, to avoid a problem that a timely handover cannot be performedin a case in which the UE leaves the second-type cell for a short timeand enters the coverage of only the first-type cell, and the like, anevent 1b of the first-type cell may not be reported, so that thefirst-type cell is retained in the active set to facilitate access.

In another implementation manner, if a cell with the first HCS priorityand a cell with the second HCS priority that are indicated by themeasurement configuration information simultaneously exist in the activeset, and an optimal cell or a serving cell is the cell with the secondHCS priority, an event 1b of the cell with the first HCS priority is notreported.

103 d. If an optimal cell or a serving cell is a first-type cellindicated by the measurement configuration information, when cell signalquality or signal strength of a first-type cell other than the optimalcell or serving cell meets an event 1b trigger threshold, report anevent 1b of the first-type cell other than the optimal cell or servingcell.

If two or more first-type cells simultaneously exist in the active setof the UE, regardless of whether a second-type cell exists in the activeset, a cell with highest signal quality or signal strength may beselected from the multiple first-type cells as an optimal cell or aserving cell, while an event 1b of the other first-type cells isreported, and the other first-type cells than the optimal cell orserving cell are removed from the active set to save radio linkresources.

In another implementation manner, if an optimal cell or a serving cellis a cell with the first HCS priority indicated by the measurementconfiguration information, when cell signal quality or signal strengthof another cell with the first HCS priority than the optimal cell orserving cell meets an event 1b trigger threshold, an event 1b of theanother cell with the first HCS priority than the optimal cell orserving cell is reported.

By using the measurement control method provided in the foregoingimplementation manners of the embodiment of the present application, auser equipment (UE) may determine, according to a first-type cell and asecond-type cell that are indicated by measurement configurationinformation, whether to report an event or a measurement result; and inanother embodiment of the present invention, determine, according to acell with the first HCS priority and a cell with the second HCS priorityindicated by measurement configuration information, whether to report anevent or a measurement result. In comparison with the prior art in whichevents or measurement results are uniformly reported according to cellsignal quality or signal strength, non-reporting or deferred reportingor advance reporting of an event or a measurement result of a first-typecell or a cell with the first HCS priority may be controlled accordingto a requirement, so that an objective of deferring removing thefirst-type cell or the cell with the first HCS priority from an activeset of the UE or adding in advance the UE to an active set is achieved.Thereby, a handover signaling overhead for handing over to thefirst-type cell or the cell with the first HCS priority may be reduced,handing over to the first-type cell or the cell with the first HCSpriority in time is implemented, and a handover failure is avoided.

Optionally, in another implementation manner of the embodiment of thepresent application, a specific implementation method of step 103 mayfurther be as follows:

103 e. If a first-type cell and a second-type cell that are indicated bythe measurement configuration information simultaneously exist in theactive set, a measurement result of the second-type cell does not affectevent evaluation of the first-type cell.

An implementation manner of steps 103 a and 103 b is using a measurementresult of a second-type cell to affect event evaluation of a first-typecell, and when an event 1b trigger threshold is met, determining,according to the measurement configuration information, whether toreport an event 1b. In steps 103 e and 103 f, in evaluation of whether afirst-type cell meets an event 1b, a measurement result of a second-typecell is not considered, so that the first-type cell does not meet theevent 1b trigger threshold due to high signal quality or signal strengthof the second-type cell.

103 f. If only a first-type cell indicated by the measurementconfiguration information exists in the active set, when cell signalquality or signal strength of the first-type cell meets an event 1btrigger threshold, use a measurement result of a second-type cell toaffect event evaluation of the first-type cell, so that the cell isremoved from the active set according to an active set update messagesent by the control node.

Similarly, step 103 may further include the following implementationmanners:

If a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in the active set, skipping using a measurementresult of the cell with the second HCS priority to affect eventevaluation of the cell with the first HCS priority; in anotherembodiment of the present invention, if only a cell with the first HCSpriority indicated by the measurement configuration information existsin the active set, when cell signal quality or signal strength of thecell with the first HCS priority meets an event 1b trigger threshold, ameasurement result of a cell with the second HCS priority is used toaffect event evaluation of the cell with the first HCS priority.

In another embodiment of the present invention, if a first-type cell anda second-type cell that are indicated by the measurement configurationinformation simultaneously exist in the active set, and an optimal cellor a serving cell is the second-type cell, a measurement result of thesecond-type cell does not affect event evaluation of the first-typecell; in another embodiment of the present invention, if an optimal cellor a serving cell is a first-type cell indicated by the measurementconfiguration information, when cell signal quality or signal strengthof a first-type cell other than the optimal cell or serving cell meetsan event 1b trigger threshold, a measurement result of a second-typecell is used to affect event evaluation of the first-type cell.

In another embodiment of the present invention, if a cell with the firstHCS priority and a cell with the second HCS priority that are indicatedby the measurement configuration information simultaneously exist in theactive set, and an optimal cell or a serving cell is the cell with thesecond HCS priority, skipping using a measurement result of the cellwith the second HCS priority to affect event evaluation of the cell withthe first HCS priority; in another embodiment of the present invention,if an optimal cell or a serving cell is a cell with the first HCSpriority indicated by the measurement configuration information, whencell signal quality or signal strength of another cell with the firstHCS priority than the optimal cell or serving cell meets an event 1btrigger threshold, a measurement result of a cell with the second HCSpriority is used to affect event evaluation of the cell with the firstHCS priority.

By using the measurement control method provided in the foregoingimplementation manners of the embodiment of the present application, auser equipment (UE) may selectively use, according to first-type cellsand second-type cells or cells with the first HCS priority and cells ofthe second HCS priority that are indicated by measurement configurationinformation, measurement results of some cells to affect eventevaluation of the first-type cells, so that the first-type cells or thecells with the first HCS priority do not easily meet an event 1b triggerthreshold , and that an objective of deferring removing the first-typecells or the cells with the first HCS priority from an active set of theUE is achieved. Thereby, handover signaling overheads for handing overto the first-type cells or the cells with the first HCS priority may bereduced, handing over to the first-type cells or the cells with thefirst HCS priority in time is implemented, and handover failures areavoided.

Optionally, in another implementation manner of the embodiment of thepresent application, a specific implementation method of step 103 mayfurther be as follows: 103 g. According to the dedicated parameter forevaluating the event trigger threshold in the measurement configurationinformation, evaluate whether an event is met, and if the event is met,trigger reporting of the event to the control node, so that the controlnode sends an active set update message to the UE according to thereceived event.

For example, when signal quality or signal strength of a cell is higherthan an event 1b trigger threshold that is obtained by using thededicated parameter, an event 1b trigger threshold is met. When signalquality or signal strength of a cell is lower than an event 1a triggerthreshold that is obtained by using the dedicated parameter, an event 1ais met.

The measurement configuration information includes the dedicatedparameter for evaluating the event trigger threshold. The dedicatedparameter for evaluating the event trigger threshold includes: arelative dedicated offset for evaluating the event trigger threshold oran absolute dedicated parameter for evaluating the event triggerthreshold. The network side may send one or a group of relativededicated offsets for evaluating the event trigger threshold. The UE mayobtain a new parameter by calculation by adding the offset to theoriginal parameter for evaluating the event trigger threshold, evaluatethe event trigger threshold by using the new parameter, and triggerreporting. In another embodiment of the present invention, the networkside may also send an absolute dedicated parameter, so that the UE maydetermine an event by using the newly configured absolute dedicatedparameter.

Specifically, the dedicated parameter for evaluating the event triggerthreshold may include one or more of the following parameters: a cellindividual offset (CIO), a hysteresis, a weight, a reporting range, andduration meeting an event trigger condition. In the measurementconfiguration information, dedicated parameters may be sent for one ormore cells, for a type of cell, or for a list of cells. In an actualapplication, one of the parameters may be changed, or multipleparameters may be changed.

For example, when the UE is in a small cell, a dedicated evaluationparameter may be configured for a macro cell, so that an event triggerthreshold of the macro cell, which is obtained by the UE by calculationaccording to the dedicated evaluation parameter, is lower. For example,a larger CIO, a smaller hysteresis, a larger weight (W), a largerreporting range (R), and the like may be configured for the macro cell,so that the macro cell triggers an event 1a earlier and joins the activeset in advance, and on the other hand, triggers an event 1b later, anddefers exiting the active set. For another example, when the UE is in amacro cell, a dedicated evaluation parameter may be configured for asmall cell, so that a dedicated event trigger threshold of the smallcell is higher. For example, a smaller CIO, a larger hysteresis, asmaller weight (W), a larger reporting range (R), and the like may beconfigured for the small cell, so that the small cell triggers an event1a later and defers joining the active set.

By using the measurement control method provided in the foregoingapplication scenario of the embodiment of the present application, anevent trigger threshold of a specific cell may be evaluated according toa dedicated parameter indicated by measurement configurationinformation. In comparison with the prior art in which all cells use asame event trigger threshold, an event trigger threshold may be adjustedaccording to a requirement, and an objective of deferring removing afirst-type cell from an active set of a user equipment (UE) or adding inadvance a corresponding cell to an active set of the UE is achieved.Thereby, a handover signaling overhead for handing over to thefirst-type cell may be reduced, handing over to the first-type cell intime is implemented, and a handover failure is avoided.

Optionally, in another application scenario of the embodiment of thepresent application, a specific implementation method of step 103 mayfurther be as follows: 103 h. If the cell is a first-type cell or a cellwith the first HCS priority indicated by the measurement configurationinformation, preferentially report the measurement result of the cell tothe control node.

The measurement configuration information includes a list of first-typecells, the type of first-type cells, HCS priorities, or a frequency offirst-type cells. The cells include all cells detected by the UE. The UEmay detect signal quality or signal strength of one or more cells.However, in this embodiment, because the number of measurement resultsreported by the UE on a random access channel (RACH) is limited,measurement results of the first-type cells or cells with the first HCSpriority are preferentially reported according to a rule indicated bythe measurement configuration information. For example, the maximumnumber of intra-frequency cell measurement results reported on the RACHis a current cell plus six optimal neighboring cells. Forinter-frequency cell measurements, measurement results of only eightcells can be reported at most. Therefore, by using the measurementconfiguration information, priorities for reporting measurement resultsmay be specified. Thereby, measurement results of the first-type cellsare reported preferentially, and it is convenient for the network toperform macro cell diversity reception and transmission in time. For anintra-frequency scenario, a radio link between the UE and a macro cellmay be established as early as possible. For an inter-frequencyscenario, redirection may be performed in advance. Thereby, a problemthat a radio link failure or a handover failure occurs because themoving UE cannot be handed over in time is avoided.

By using the measurement control method provided in the foregoingapplication scenario of the embodiment of the present application,discriminative reporting of measurement results such as preferentialreporting or deferred reporting may be performed according to first-typecells and second-type cells indicated by measurement configurationinformation. In comparison with the prior art in which a same policy isused to report measurement results of all cells, a time sequence forreporting a measurement result of each cell may be configured accordingto a requirement, so that an objective of deferring removing afirst-type cell from an active set of a user equipment (UE) or adding inadvance a corresponding cell to an active set of the UE is achieved.Thereby, a handover signaling overhead for handing over to thefirst-type cell may be reduced, handing over to the first-type cell intime is implemented, and a handover failure is avoided.

Another embodiment of the present application further provides ameasurement control method, where a dedicated filter coefficient may beused to adjust measurement reporting of a user equipment (UE), as shownin FIG. 2.

201. A user equipment (UE) receives a dedicated filter coefficient sentby a control node.

The dedicated filter coefficient includes: an offset relative to afilter coefficient, or a new absolute filter coefficient. When theoffset relative to the filter coefficient is received, an absolutefilter coefficient is obtained by calculation according to an initialfilter coefficient and the offset relative to the filter coefficient.The manner of sending a dedicated filter coefficient is similar to themanner of sending a dedicated parameter that is described in step 103 e.A new absolute filter coefficient may also be acquired from a networkside and used as a dedicated filter coefficient. In this embodiment, afilter coefficient used for an event 1a or 1a and a filter coefficientused for an event 1d may be the same or may be different. For example,for the event 1d, a dedicated filter coefficient may not be used, but anexisting filter coefficient may continue to be used. The event 1d meansthat an optimal cell of the UE changes.

202. The UE detects cell signal quality or signal strength of a cell.

203. The UE calculates a filtered measurement result according to thededicated filter coefficient of the cell and the cell signal quality orsignal strength.

A filter formula for calculating a filtered measurement result accordingto a latest measurement result and a filter coefficient is:Fn=(1−a)Fn−1+aMn, where a=1/2(k/2), k is a filter coefficient, Fn is afiltered measurement result, Fn−1 is a historical measurement result,and Mn is a latest measurement result received by the UE from a physicallayer.

For example, when an optimal cell or a serving cell is a first-type cellor a cell with the first HCS priority, the dedicated filter coefficientconfigured by the network for the UE may have a positive offset relativeto the existing filter coefficient. For example, when the UE enterscoverage of a small cell from a macro cell, for a smooth handover, afilter coefficient of the small cell may be increased, so that signalquality or signal strength of the small cell increases slowly. Inanother embodiment of the present invention, a filter coefficient of themacro cell is increased, so that signals of the macro cell deteriorateslowly, and thereby adding the small cell to an active set is deferred.

When an optimal cell or a serving cell is a second-type cell or a cellwith a higher priority, the dedicated filter coefficient configured bythe network for the UE may have a negative offset relative to theexisting filter coefficient. For example, when the UE leaves thecoverage of the small cell, because signal quality or signal strength ofthe small cell deteriorates quickly, for handing over to the macro cellin time, the filter coefficient of the small cell may be reduced, sothat signals of the small cell deteriorate slowly and that the macrocell is added to the active set in advance.

204. The UE performs event evaluation according to the filteredmeasurement result, and if an event is met, reports a measurement resultto the control node.

In this embodiment, for an individual cell for which a dedicated filtercoefficient is configured, the UE does not directly report detected cellsignal quality or signal strength to the control node as a measurementresult, but reports a filtered measurement result that is calculated byusing the dedicated filter coefficient.

205. The control node updates an active set according to the receivedmeasurement report.

For example, when the measurement result indicates that signal qualityof cell A in the active set is lower than a predetermined threshold, anactive set update message for removing cell A is sent to the UE; whenthe measurement result indicates that signal quality of cell B beyondthe active set is higher than a predetermined threshold, an active setupdate message for adding cell B to the active set is sent to the UE.

In this embodiment, smooth processing may be performed for a measurementresult according to a dedicated filter coefficient, so that cell signalquality or signal strength changes smoothly, and thereby a control nodemay update an active set according to a filtered measurement result.

By using the measurement control method provided by the embodiment ofthe present application, smooth filtering may be performeddiscriminatively for detected measurement results according to adedicated filter coefficient of each cell. In comparison with the priorart in which a same filter coefficient is used to calculate measurementresults of all cells, a change of the measurement result of each cellmay be accelerated or slowed down according to a requirement, so that anobjective of deferring removing a first-type cell from an active set ofa user equipment (UE) or adding in advance a corresponding cell to anactive set of the UE is achieved. Thereby, the first-type cell isretained in the active set as far as possible, a handover signalingoverhead for handing over to the first-type cell may be reduced, handingover to the first-type cell in time is implemented, and a handoverfailure is avoided.

Another embodiment of the present application further provides ameasurement control method. As shown in FIG. 3, the method of thisembodiment may be as follows:

301. A user equipment (UE) detects signal quality or signal strength ofa cell.

302. When the signal quality or signal strength of the cell meets anevent 1b trigger threshold, a control node receives an event 1b of thecell reported by the UE.

In this embodiment, measurement configuration information is configuredon the control node, but may not be sent to the UE, and the UE normallyperforms a measurement and reports an event 1b.

303. According to measurement configuration information and the event1b, the control node determines whether to send, to the UE, an activeset update message for removing a first-type cell or a cell with thefirst HCS priority.

For example, the measurement configuration information includes a listof first-type cells, the type of first-type cells, a list of second-typecells, the type of second-type cells, hierarchical cell structure (HCS)priorities, a frequency of first-type cells, or a dedicated parameterfor evaluating an event trigger threshold.

Similar to the measurement configuration information described in steps103 a, 103 b, 103 c, and 103 d, the measurement configurationinformation in this embodiment may indicate first-type cells andsecond-type cells; in another embodiment of the present invention, themeasurement configuration information may indicate cells with the firstHCS priority and cells of the second HCS priority. After receiving anevent 1b reported by the UE, the control node determines, according tothe first-type cells and second-type cells indicated by the measurementconfiguration information, to send an active set update message; inanother embodiment of the present invention, the control nodedetermines, according to the cells with the first HCS priority and thecells of the second HCS priority indicated by the measurementconfiguration information, to send an active set update message.

Further, optionally, after receiving an event 1b, the control node maynot necessarily send an active set update message to the UE. Therefore,the control node may also send the measurement configuration informationto the UE in advance, so that after the UE reports an event 1b, the UEmay not expect the control node to send an active set update message forremoving a first-type cell or a cell with the first HCS priority, thatis, even if no active set update message is received in a time period,reporting of an event 1b is not changed to periodic reporting of anevent 1b. Then after the UE reports an event 1b of a first-type cell ora cell with the first HCS priority, if still no active set updatemessage is received in a time period, sending of an event 1b of thefirst-type cell or the cell with the first HCS priority is not changedto periodic sending.

Further, optionally, in an implementation manner of this embodiment, aspecific implementation method of step 303 may be as follows:

303 a. If a first-type cell and a second-type cell that are indicated bythe measurement configuration information simultaneously exist in anactive set of the UE, do not send an active set update message forremoving the first-type cell. In another embodiment of the presentinvention, if a cell with the first HCS priority and a cell with thesecond HCS priority that are indicated by the measurement configurationinformation simultaneously exist in an active set of the UE, an activeset update message for removing the cell with the first HCS priority isnot sent.

303 b. If only a first-type cell indicated by the measurementconfiguration information exists in an active set of the UE, after anevent 1b of the first-type cell reported by the UE is received, send, tothe UE, an active set update message for removing the first-type cell.

In another embodiment of the present invention, if only a cell with thefirst HCS priority indicated by the measurement configurationinformation exists in an active set of the UE, after an event 1b that isof the cell with the first HCS priority and reported by the UE isreceived, an active set update message for removing the cell with thefirst HCS priority is sent to the UE.

A determining method in steps 303 a and 303 b is similar to that insteps 103 a and 103 b. A difference lies in that in this embodiment, theUE performs reporting normally and that an entity for determiningwhether to update the active set is the control node.

Optionally, in another implementation manner of the embodiment of thepresent application, a specific implementation method of step 303 mayfurther be as follows:

303 c. If a first-type cell and a second-type cell that are indicated bythe measurement configuration information simultaneously exist in anactive set of the UE, and an optimal cell or a serving cell is thesecond-type cell, do not send, to the UE, an active set update messagefor removing the first-type cell.

In another embodiment of the present invention, if a cell with the firstHCS priority and a cell with the second HCS priority that are indicatedby the measurement configuration information simultaneously exist in anactive set of the UE, and an optimal cell or a serving cell is the cellof the second HCS priority, an active set update message for removingthe cell with the first HCS priority is not sent to the UE.

303 d. If an optimal cell or a serving cell of the UE is a first-typecell indicated by the measurement configuration information, and anevent 1b that is of a first-type cell other than the optimal cell orserving cell and reported by the UE is received, send an active setupdate message for removing the first-type cell.

In another embodiment of the present invention, if an optimal cell or aserving cell of the UE is a cell with the first HCS priority indicatedby the measurement configuration information, when an event 1b that isof a cell with the first HCS priority other than the optimal cell orserving cell and reported by the UE is received, an active set updatemessage for removing the cell with the first HCS priority is sent.

A determining method in steps 303 c and 303 d is similar to that insteps 103 c and 103 d. A difference lies in that in this embodiment, theUE performs reporting normally and that an entity for determiningwhether to update the active set is the control node.

By using the measurement control method provided by the embodiment ofthe present application, a control node may discriminatively send anactive set update message according to first-type cells and second-typecells indicated by measurement configuration information or according tocells with the first HCS priority and cells with a higher priorityindicated by measurement configuration. In comparison with the prior artin which after an event 1b of each cell is received, an active setupdate message is uniformly sent and the cell is removed, the controlnode may select, according to a requirement, temporarily not to send anactive set update message for removing a first-type cell or a cell withthe first HCS priority, and thereby achieve an objective of deferringremoving the first-type cell or the cell with the first HCS priorityfrom an active set of a user equipment (UE). Thereby, the first-typecell or the cell with the first HCS priority is retained in the activeset as far as possible, a handover signaling overhead for handing overto the first-type cell or the cell with the first HCS priority may bereduced, handing over to the first-type cell or the cell with the firstHCS priority in time is implemented, and a handover failure is avoided.

Another embodiment of the present application further provides a userequipment (UE). As shown in FIG. 4, the UE may include a receiving unit41, a detecting unit 42, and a determining unit 43.

The receiving unit 41 is configured to receive measurement configurationinformation sent by a control node, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold.

The detecting unit 42 is configured to detect cell signal quality orsignal strength of a cell.

The determining unit 43 is configured to determine, according to thecell signal quality or signal strength detected by the detecting unit 42and the measurement configuration information received by the receivingunit, whether to report an event or a measurement result to the controlnode.

Further, optionally, in an implementation manner of this embodiment, thedetermining unit 43 includes a first determining module 431 and a seconddetermining module 432.

The first determining module 431 is configured to: when a first-typecell and a second-type cell that are indicated by the measurementconfiguration information received by the receiving unit 41simultaneously exist in an active set, skip reporting an event 1b of thefirst-type cell, or in another embodiment of the present invention, skipusing a measurement result of the second-type cell to affect eventevaluation of the first-type cell.

The second determining module 432 is configured to: when only afirst-type cell indicated by the measurement configuration informationreceived by the receiving unit 41 exists in the active set, and cellsignal quality or signal strength of the first-type cell meets an event1b trigger threshold, report an event 1b of the first-type cell, or inanother embodiment of the present invention, use a measurement result ofa second-type cell to affect event evaluation of the first-type cell, sothat the cell is removed from the active set according to an active setupdate message sent by the control node.

Optionally, in another implementation manner of this embodiment, thedetermining unit 43 includes a third determining module 433 and a fourthdetermining module 434.

The third determining module 433 is configured to: when a first-typecell and a second-type cell that are indicated by the measurementconfiguration information received by the receiving unit 41simultaneously exist in an active set, and an optimal cell or a servingcell is the second-type cell, skip reporting an event 1b of thefirst-type cell, or in another embodiment of the present invention, ameasurement result of the second-type cell does not affect eventevaluation of the first-type cell; in another embodiment of the presentinvention, when a cell with the first HCS priority and a cell with thesecond HCS priority that are indicated by the measurement configurationinformation simultaneously exist in an active set, and an optimal cellor a serving cell is the cell with the second HCS priority, skipreporting an event 1b of the cell with the first HCS priority, or inanother embodiment of the present invention, skipping using ameasurement result of the cell with the second HCS priority to affectevent evaluation of the cell with the first HCS priority.

The fourth determining module 434 is configured to: when an optimal cellor a serving cell is a first-type cell or a cell with the first HCSpriority indicated by the measurement configuration information receivedby the receiving unit 41, and cell signal quality or signal strength ofa first-type cell or a cell with the first HCS priority other than theoptimal cell or serving cell meets an event 1b trigger threshold, reportan event 1b of the first-type cell or the cell with the first HCSpriority other than the optimal cell or serving cell.

Optionally, in another implementation manner of this embodiment, thedetermining unit 43 includes a fifth determining module 435.

The fifth determining module 435 is configured to trigger reporting ofthe event to the control node according to the event trigger thresholdand the cell signal quality or signal strength of the cell, so that thecontrol node sends an active set update message to the UE according tothe received event; where

the measurement configuration information received by the receiving unit41 includes the dedicated parameter for evaluating the event triggerthreshold.

Optionally, in another implementation manner of this embodiment, thedetermining unit 43 includes a sixth determining module 436.

The sixth determining module 436 is configured to preferentially reportthe measurement result of the cell to the control node when the cell isa first-type cell indicated by the measurement configuration informationreceived by the receiving unit 41.

An embodiment of the present application further provides a userequipment (UE). As shown in FIG. 5, the UE may include a receiver 44, aprocessor 45, and a transmitter 46.

The receiver 44 is configured to receive measurement configurationinformation sent by a control node, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold.

The processor 45 is configured to detect cell signal quality or signalstrength of a cell.

The transmitter 46 is configured to determine, according to the cellsignal quality or signal strength detected by the processor 45 and themeasurement configuration information received by the receiver 44,whether to report an event or a measurement result to the control node.

Further, optionally, the transmitter 46 is further configured to: when afirst-type cell and a second-type cell that are indicated by themeasurement configuration information received by the receiver 44simultaneously exist in an active set, skip reporting an event 1b of thefirst-type cell, or in another embodiment of the present invention, ameasurement result of the second-type cell does not affect eventevaluation of the first-type cell; or

when only a first-type cell indicated by the measurement configurationinformation received by the receiver 44 exists in the active set, andcell signal quality or signal strength of the first-type cell meets anevent 1b trigger threshold, report an event 1b of the first-type cell,or in another embodiment of the present invention, use a measurementresult of a second-type cell to affect event evaluation of thefirst-type cell, so that the cell is removed from the active setaccording to an active set update message sent by the control node.

Optionally, the transmitter 46 is further configured to: when afirst-type cell and a second-type cell that are indicated by themeasurement configuration information received by the receiver 44simultaneously exist in the active set, and an optimal cell or a servingcell is the second-type cell, skip reporting an event 1b of thefirst-type cell, or in another embodiment of the present invention, ameasurement result of the second-type cell does not affect eventevaluation of the first-type cell; in another embodiment of the presentinvention, when a cell with the first HCS priority and a cell with thesecond HCS priority that are indicated by the measurement configurationinformation simultaneously exist in the active set, and an optimal cellor a serving cell is the cell with the second HCS priority, skipreporting an event 1b of the cell with the first HCS priority, or inanother embodiment of the present invention, skipping using ameasurement result of the cell with the second HCS priority to affectevent evaluation of the cell with the first HCS priority; or in anotherembodiment of the present invention, when an optimal cell or a servingcell is a first-type cell or a cell with the first HCS priorityindicated by the measurement configuration information received by thereceiver, and cell signal quality or signal strength of a first-typecell or a cell with the first HCS priority other than the optimal cellor serving cell meets an event 1b trigger threshold, report an event 1bof the first-type cell or the cell with the first HCS priority otherthan the optimal cell or serving cell, or in another embodiment of thepresent invention, use a measurement result of a second-type cell toaffect event evaluation of the first-type cell.

Optionally, the transmitter 46 is further configured to: triggerreporting of the event to the control node according to the eventtrigger threshold and the cell signal quality or signal strength of thecell, so that the control node sends an active set update message to theUE according to the received event; where the measurement configurationinformation received by the receiver 44 includes the dedicated parameterfor evaluating the event trigger threshold.

Optionally, the transmitter 46 is further configured to: preferentiallyreport the measurement result of the cell to the control node when thecell is a first-type cell indicated by the measurement configurationinformation received by the receiver 44.

By using the UE provided by the embodiment of the present application,whether to report an event or a measurement result is determinedaccording to measurement configuration information and detected cellsignal quality or signal strength. In comparison with the prior art inwhich events or measurement results are uniformly reported according tocell signal quality or signal strength, non-reporting or deferredreporting or advance reporting of an event or a measurement result of afirst-type cell may be controlled according to a requirement, so thatthe first-type cell is retained in an active set of the UE as far aspossible. Thereby, a handover signaling overhead for handing over to thefirst-type cell may be reduced, handing over to the first-type cell intime is implemented, and a handover failure is avoided.

Another embodiment of the present application further provides a userequipment (UE). As shown in FIG. 6, the UE may include a receiving unit51, a detecting unit 52, a calculating unit 53, and a sending unit 54.

The receiving unit 51 is configured to receive a dedicated filtercoefficient sent by a control node.

The detecting unit 52 is configured to detect cell signal quality orsignal strength of a cell.

The calculating unit 53 is configured to calculate a filteredmeasurement result according to the dedicated filter coefficient of thecell received by the receiving unit 51 and the cell signal quality orsignal strength detected by the detecting unit.

The sending unit 54 is configured to report the filtered measurementresult obtained by the calculating unit 53 by calculation to the controlnode.

An embodiment of the present application further provides a userequipment (UE). As shown in FIG. 7, the UE includes a receiver 55, aprocessor 56, and a transmitter 57.

The receiver 55 is configured to receive a dedicated filter coefficientsent by a control node.

The processor 56 is configured to detect cell signal quality or signalstrength of a cell, and calculate a filtered measurement resultaccording to the dedicated filter coefficient of the cell received bythe receiver 55 and the detected cell signal quality or signal strength.

The transmitter 57 is configured to report the filtered measurementresult obtained by the processor 56 by calculation to the control node.

It should be noted that, implementation of functions such as caching andstoring some data or information necessarily requires a memory; becauseuse of the memory is a common technical means for a person skilled inthe art, the memory is not further described in detail in any embodimentof the present application.

By using the UE provided by the embodiment of the present application,whether to report an event or a measurement result is determinedaccording to a dedicated filter coefficient and detected cell signalquality or signal strength. In comparison with the prior art in whichevents or measurement results are uniformly reported according to cellsignal quality or signal strength, non-reporting or deferred reportingor advance reporting of an event or a measurement result of a first-typecell may be controlled according to a requirement, so that thefirst-type cell or a cell with the first HCS priority is retained in anactive set of the UE as far as possible. Thereby, a handover signalingoverhead for handing over to the first-type cell or the cell with thefirst HCS priority may be reduced, handing over to the first-type cellor the cell with the first HCS priority in time is implemented, and ahandover failure is avoided.

Another embodiment of the present application further provides a controlnode, which may include a first sending unit 61, a receiving unit 62,and a second sending unit 63.

The first sending unit 61 is configured to send measurementconfiguration information to a user equipment (UE), where themeasurement configuration information includes a list of first-typecells, the type of first-type cells, a list of second-type cells, thetype of second-type cells, hierarchical cell structure (HCS) priorities,a frequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

The receiving unit 62 is configured to: when the UE determines,according to cell signal quality or signal strength and the measurementconfiguration information, to report an event or a measurement result,receive the event or the measurement result reported by the UE.

The second sending unit 63 is configured to send an active set updatemessage to the UE according to the event or the measurement resultreceived by the receiving unit 62.

This embodiment further provides another control node, including atransmitter 64 and a receiver 65.

The transmitter 64 is configured to send measurement configurationinformation to a user equipment (UE), where the measurementconfiguration information includes a list of first-type cells, the typeof first-type cells, a list of second-type cells, the type ofsecond-type cells, hierarchical cell structure (HCS) priorities, afrequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold.

The receiver 65 is configured to: when the UE determines, according tocell signal quality or signal strength and the measurement configurationinformation, to report an event or a measurement result, receive theevent or the measurement result reported by the UE.

The transmitter 64 is further configured to send an active set updatemessage to the UE according to the event or the measurement resultreceived by the receiver 65.

The control node provided by the embodiment of the present applicationsends measurement configuration information to a user equipment (UE), sothat the UE is controlled to determine, according to the measurementconfiguration information and detected cell signal quality or signalstrength, whether to report an event or a measurement result. Incomparison with the prior art in which events or measurement results areuniformly reported according to cell signal quality or signal strength,the UE may be controlled, according to a requirement, not to report orto defer reporting or to report in advance an event or a measurementresult of a first-type cell, so that the first-type cell is retained inan active set of the UE as far as possible. Thereby, a handoversignaling overhead for handing over to the first-type cell may bereduced, handing over to the first-type cell in time is implemented, anda handover failure is avoided.

Another embodiment of the present application further provides a controlnode. As shown in FIG. 9, the control node may include a sending unit 71and a receiving unit 72.

The sending unit 71 is configured to send a dedicated filter coefficientto a user equipment (UE).

The receiving unit 72 is configured to receive a filtered measurementresult reported by the UE, where the filtered measurement result isobtained by calculation according to the dedicated filter coefficientand cell signal quality or signal strength.

Further, the sending unit 71 may include a first sending unit 711 and asecond sending unit 712.

The first sending unit 711 is configured to: when an optimal cell or aserving cell of the UE is a first-type cell or a cell with the first HCSpriority, send, to the UE, a dedicated filter coefficient that has apositive offset relative to an existing filter coefficient.

The second sending unit 712 is configured to: when an optimal cell or aserving cell of the UE is a second-type cell or a cell with the secondHCS priority, send, to the UE, a dedicated filter coefficient that has anegative offset relative to an existing filter coefficient.

This embodiment further provides a control node, including a transmitter73 and a receiver 74.

The transmitter 73 is configured to send a dedicated filter coefficientto a user equipment (UE).

The receiver 74 is configured to receive a filtered measurement resultreported by the UE, where the filtered measurement result is obtained bycalculation according to the dedicated filter coefficient and cellsignal quality or signal strength.

Further, optionally, the transmitter 73 is further configured to: whenan optimal cell or a serving cell of the UE is a first-type cell or acell with the first HCS priority, send, to the UE, a dedicated filtercoefficient that has a positive offset relative to an existing filtercoefficient; or when an optimal cell or a serving cell of the UE is asecond-type cell or a cell with the second HCS priority, send, to theUE, a dedicated filter coefficient that has a negative offset relativeto an existing filter coefficient.

The control node provided by the embodiment of the present applicationsends a dedicated filter coefficient to a user equipment (UE) for one ormore cells, so that the UE is controlled to determine, according to thededicated filter coefficient and detected cell signal quality or signalstrength, whether to report an event or a measurement result. Incomparison with the prior art in which events or measurement results areuniformly reported according to cell signal quality or signal strength,the UE may be controlled, according to a requirement, not to report orto defer reporting or to report in advance an event or a measurementresult of a first-type cell, so that the first-type cell is retained inan active set of the UE as far as possible. Thereby, a handoversignaling overhead for handing over to the first-type cell may bereduced, handing over to the first-type cell in time is implemented, anda handover failure is avoided.

Another embodiment of the present application further provides a controlnode. As shown in FIG. 10, the control node may include: a receivingunit 81, configured to receive an event 1b of a cell reported by a userequipment (UE); and a determining unit 82, configured to determine,according to measurement configuration information and the event 1breceived by the receiving unit 81, whether to send an active set updatemessage to the UE, where the measurement configuration informationincludes a list of first-type cells, the type of first-type cells, alist of second-type cells, the type of second-type cells, hierarchicalcell structure (HCS) priorities, a frequency of first-type cells, or adedicated parameter for evaluating an event trigger threshold.

In an implementation manner of this embodiment, the determining unit 82includes a seventh determining unit 821 and an eighth determining unit822.

The seventh determining unit 821 is configured to: when a first-typecell and a second-type cell that are indicated by the measurementconfiguration information simultaneously exist in an active set of theUE, skip sending an active set update message for removing thefirst-type cell.

The eighth determining unit 822 is configured to: when only a first-typecell indicated by the measurement configuration information exists inthe active set of the UE, and after an event 1b of the first-type cellreported by the UE is received, send, to the UE, an active set updatemessage for removing the first-type cell.

In another implementation manner of this embodiment, the determiningunit 82 includes a ninth determining unit 823 and a tenth determiningunit 824.

The ninth determining unit 823 is configured to: when a first-type celland a second-type cell that are indicated by the measurementconfiguration information simultaneously exist in an active set of theUE, and an optimal cell or a serving cell is the second-type cell, skipsending, to the UE, an active set update message for removing thefirst-type cell; or in another embodiment of the present invention, whena cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set, and an optimal cell or a servingcell is the cell with the second HCS priority, skip reporting an event1b of the cell with the first HCS priority.

The tenth determining unit 824 is configured to: when an optimal cell ora serving cell of the UE is a first-type cell or a cell with the firstHCS priority indicated by the measurement configuration information, andan event 1b that is of a first-type cell or a cell with the first HCSpriority other than the optimal cell or serving cell and reported by theUE is received, send an active set update message for removing thefirst-type cell or the cell with the first HCS priority than the optimalcell or serving cell.

This embodiment further provides a control node, including: a receiver83, configured to receive an event 1b of a cell reported by a userequipment (UE); and a transmitter 84, configured to determine, accordingto measurement configuration information and the event 1b received bythe receiver 83, whether to send an active set update message to the UE,where the measurement configuration information includes a list offirst-type cells, the type of first-type cells, a list of second-typecells, the type of second-type cells, hierarchical cell structure (HCS)priorities, a frequency of first-type cells, or a dedicated parameterfor evaluating an event trigger threshold.

Further, optionally, the transmitter 84 is further configured to: when afirst-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, skip sending an active set update message for removingthe first-type cell; or when only a first-type cell indicated by themeasurement configuration information exists in an active set of the UE,after an event 1b of the first-type cell reported by the UE is received,send, to the UE, an active set update message for removing thefirst-type cell.

Optionally, the transmitter 84 is further configured to: when afirst-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset of the UE, and an optimal cell or a serving cell is the second-typecell, skip sending, to the UE, an active set update message for removingthe first-type cell; or in another embodiment of the present invention,when a cell with the first HCS priority and a cell with the second HCSpriority that are indicated by the measurement configuration informationsimultaneously exist in an active set, and an optimal cell or a servingcell is the cell with the second HCS priority, skip sending, to the UE,an active set update message for removing the first-type cell; or whenan optimal cell or a serving cell of the UE is a first-type cell or acell with the first HCS priority indicated by the measurementconfiguration information, and an event 1b that is of a first-type cellor a cell with the first HCS priority other than the optimal cell orserving cell and reported by the UE is received, send an active setupdate message for removing the first-type cell or the cell with thefirst HCS priority than the optimal cell or serving cell.

By using the control node provided by the embodiment of the presentapplication, whether to report an event or a measurement result isdetermined according to measurement configuration information anddetected cell signal quality or signal strength. In comparison with theprior art in which events or measurement results are uniformly reportedaccording to cell signal quality or signal strength, non-reporting ordeferred reporting or advance reporting of an event or a measurementresult of a first-type cell may be controlled according to arequirement, so that the first-type cell is retained in an active set ofa user equipment (UE) as far as possible. Thereby, a handover signalingoverhead for handing over to the first-type cell may be reduced, handingover to the first-type cell in time is implemented, and a handoverfailure is avoided.

Another embodiment of the present application further provides ameasurement control system. As shown in FIG. 11, the system may includea control node 91 and a user equipment (UE) 92.

Optionally, the control node 91 is configured to: send measurementconfiguration information to the UE 92, where the measurementconfiguration information includes a list of first-type cells, the typeof first-type cells, a list of second-type cells, the type ofsecond-type cells, hierarchical cell structure (HCS) priorities, afrequency of first-type cells, or a dedicated parameter for evaluatingan event trigger threshold; if the UE 92 determines, according to cellsignal quality or signal strength and the measurement configurationinformation, to report an event or a measurement result, receive theevent or the measurement result reported by the UE 92; and send anactive set update message to the UE 92 according to the event ormeasurement result.

Correspondingly, the UE 92 is configured to: receive the measurementconfiguration information sent by the control node 91, where themeasurement configuration information includes the list of thefirst-type cells, the type of the first-type cells, the list of thesecond-type cells, the type of the second-type cells, the hierarchicalcell structure (HCS) priorities, the frequency of the first-type cells,or the dedicated parameter for evaluating the event trigger threshold;detect the cell signal quality or signal strength of a cell; anddetermine, according to the cell signal quality or signal strength andthe measurement configuration information, whether to report the eventor measurement result to the control node 91.

Optionally, the control node 91 is configured to: send a dedicatedfilter coefficient to the UE 92; and receive a filtered measurementresult reported by the UE 92, where the filtered measurement result isobtained by calculation according to the dedicated filter coefficientand cell signal quality or signal strength.

Correspondingly, the UE 92 is configured to: receive the dedicatedfilter coefficient sent by the control node 91; detect the cell signalquality or signal strength of a cell; calculate the filtered measurementresult according to the dedicated filter coefficient of the cell and thecell signal quality or signal strength; and report the filteredmeasurement result to the control node 91.

Optionally, the control node 91 is configured to: receive an event 1b ofa cell reported by the UE 92; and determine, according to measurementconfiguration information and the event 1b, whether to send an activeset update message to the UE 92, where the measurement configurationinformation includes a list of first-type cells, the type of first-typecells, a list of second-type cells, the type of second-type cells,hierarchical cell structure (HCS) priorities, a frequency of first-typecells, or a dedicated parameter for evaluating an event triggerthreshold.

Correspondingly, the UE 92 is configured to: report the event 1b of thecell to the control node 91 according to detected cell signal quality orsignal strength; and for the first-type cells indicated by themeasurement configuration information, have no expectation that thecontrol node 91 sends an active set update message.

Another embodiment of the present application further provides a linkmanagement method, including:

1001. A control node sends a link management indication to a basestation, so that the base station no longer sends a radio link failureindication to the control node or sends a radio link failure indicationto the control node for only a limited number of times.

The control node may instruct the base station to perform specialprocessing for radio link management of some cells, for example,instruct the base station not to send a radio link failure indicationeven if first-type cells are out of synchronization, or to send a radiolink failure indication for only a limited number of times in anotherembodiment of the present invention, for example, one time or two times.In another embodiment of the present invention, the control node mayinstruct the base station not to change sending of a radio link failureindication to periodic event reporting even if the base station does notreceive in a time period after sending the radio link failureindication, a link removal message sent by the control node, so that theradio link failure indication does not need to be sent to the controlnode repeatedly. The some cells may be first-type cells, cells with thefirst HCSHCS priority, or other specific cells.

Another embodiment of the present application further provides a controlnode, including a transmitter 1002, configured to send a link managementindication to a base station, so that the base station no longer sends aradio link failure indication to the control node or sends a radio linkfailure indication to the control node for only a limited number oftimes.

Another embodiment of the present application further provides a linkmanagement method, including the following contents.

1101. A base station receives a link management indication sent by acontrol node, where the link management indication is used to instructthe base station to no longer send a radio link failure indication tothe control node or to send a radio link failure indication to thecontrol node for only a limited number of times.

Another embodiment of the present application further provides a basestation, including a receiver 1102 configured to receive a linkmanagement indication sent by a control node, where the link managementindication is used to instruct the base station to no longer send aradio link failure indication to the control node or to send a radiolink failure indication to the control node for only a limited number oftimes.

Another embodiment of the present application further provides a linkmanagement method, including:

1201. A base station receives a synchronization detection parameter sentby a control node, where the synchronization detection parameterincludes at least one piece of the following information: the number ofsynchronization primitives, the number of out-of-synchronizationprimitives, and a failure detection timer.

1202. The base station performs uplink synchronization detectionaccording to the synchronization detection parameter.

Another embodiment of the present application further provides a basestation, including a receiver 1203 configured to receive asynchronization detection parameter sent by a control node, where thesynchronization detection parameter includes at least one piece of thefollowing information: the number of synchronization primitives, thenumber of out-of-synchronization primitives, and a failure detectiontimer; and a processor 1204 configured to perform uplink synchronizationdetection according to the synchronization detection parameter.

Another embodiment of the present application further provides a linkmanagement method, including the following contents.

1301. A control node sends a synchronization detection parameter to abase station, where the synchronization detection parameter includes atleast one piece of the following information: the number ofsynchronization primitives, the number of out-of-synchronizationprimitives, and a failure detection timer, so that the base stationperforms uplink synchronization detection according to thesynchronization detection parameter.

Another embodiment of the present application further provides a controlnode, including a transmitter 1302 configured to send a synchronizationdetection parameter to a base station, where the synchronizationdetection parameter includes at least one piece of the followinginformation: the number of synchronization primitives, the number ofout-of-synchronization primitives, and a failure detection timer, sothat the base station performs uplink synchronization detectionaccording to the synchronization detection parameter.

It should be noted that, to retain a first-type cell in an active set asfar as possible, it is inevitable that signal quality or signal strengthof the first-type cell is not good in some cases, and anout-of-synchronization case may occur. To avoid that the first-type cell(e.g. which is base station) sends a radio link failure indicationmessage to the control node after detecting out-of-synchronization, thecontrol node may instruct the first-type cell to perform specialprocessing for an uplink of a specific UE, and not to send a radio linkfailure indication to the control node even if out-of-synchronizationoccurs; in another embodiment of the present invention, a loosersynchronization detection parameter is configured for the first-typecell.

Configuring a looser synchronization detection parameter for thefirst-type cell includes: configuring T (a synchronization detectiontimer), N1 (the number of out-of-synchronization primitives), N2 (thenumber of synchronization primitives), and the like. For example, afterthe first-type cell detects N1 out-of-synchronization primitives, thesynchronization detection period T is started; if N2 synchronizationprimitives are received before T expires, T is reset; and if N2synchronization primitives are not received before T expires, it isdetermined that a radio link failure occurs.

In the measurement control system provided by the embodiment of thepresent application, a user equipment (UE) determines, according tomeasurement configuration information sent by a control node anddetected cell signal quality or signal strength, whether to report anevent or a measurement result. In comparison with the prior art in whichevents or measurement results are uniformly reported according to cellsignal quality or signal strength, non-reporting or deferred reportingor advance reporting of an event or a measurement result of a first-typecell may be controlled according to a requirement, so that thefirst-type cell is retained in an active set of the UE as far aspossible. Thereby, a handover signaling overhead for handing over to thefirst-type cell may be reduced, handing over to the first-type cell intime is implemented, and a handover failure is avoided.

It may be clearly understood by a person skilled in the art that, forthe purpose of convenient and brief description, division of theforegoing function modules is taken as an example for illustration. Inactual application, the foregoing functions can be allocated todifferent function modules and implemented according to a requirement,that is, an inner structure of an apparatus is divided into differentfunction modules to implement all or some of the functions describedabove. For a detailed working process of the foregoing system,apparatus, and unit, reference may be made to a corresponding process inthe foregoing method embodiments, and details are not described hereinagain.

In the several embodiments provided in the present application, itshould be understood that the disclosed system, apparatus, and methodmay be implemented in other manners For example, the described apparatusembodiment is merely exemplary. For example, the module or unit divisionis merely logical function division and may be other division in actualimplementation. For example, a plurality of units or components may becombined or integrated into another system, or some features may beignored or not performed. In addition, the displayed or discussed mutualcouplings or direct couplings or communication connections may beimplemented through some interfaces. The indirect couplings orcommunication connections between the apparatuses or units may beimplemented in electronic, mechanical, or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located in one position, or may be distributed on a plurality ofnetwork elements. Some or all of the units may be selected according toactual needs to achieve the objectives of the solutions of theembodiments.

In addition, functional units in the embodiments of the presentapplication may be integrated into one processing unit, or each of theunits may exist alone physically, or two or more units are integratedinto one unit. The integrated unit may be implemented in a form ofhardware, or may be implemented in a form of a software functional unit.

When the integrated unit is implemented in the form of a softwarefunctional unit and sold or used as an independent product, theintegrated unit may be stored in a computer-readable storage medium.Based on such an understanding, the technical solutions of the presentapplication essentially, or the part contributing to the prior art, orall or some of the technical solutions may be implemented in the form ofa software product. The software product is stored in a storage mediumand includes several instructions for instructing a computer device(which may be a personal computer, a server, or a network device) or aprocessor (processor) to perform all or some of the steps of the methodsdescribed in the embodiments of the present application. The foregoingstorage medium includes: any medium that can store program code, such asa USB flash drive, a removable hard disk, a read-only memory (ROM), arandom access memory (RAM), a magnetic disk, or an optical disc.

The foregoing embodiments are merely intended for describing thetechnical solutions of the present application, but not for limiting thepresent application. Although the present application is described indetail with reference to the foregoing embodiments, persons of ordinaryskill in the art should understand that they may still makemodifications to the technical solutions described in the foregoingembodiments or make equivalent replacements to some technical featuresthereof, without departing from scope of the technical solutions of theembodiments of the present application.

1. A measurement control method, comprising: receiving, by a userequipment (UE), measurement configuration information sent by a controlnode, wherein the measurement configuration information comprises one ofa list of first-type cells, a type of first-type cells, a list ofsecond-type cells, a type of second-type cells, hierarchical cellstructure (HCS) priorities, a frequency of first-type cells, and adedicated parameter for evaluating an event trigger threshold;detecting, by the UE, one of cell signal quality and signal strength ofa cell; and determining, by the UE, according to the measurementconfiguration information and one of the cell signal quality and signalstrength respectively, whether to report an event or a measurementresult of the cell to the control node.
 2. The method according to claim1, further comprising: if a first-type cell and a second-type cell thatare indicated by the measurement configuration informationsimultaneously exist in an active set, skipping reporting an event 1b ofthe first-type cell, or skipping using a measurement result of thesecond-type cell to affect event evaluation of the first-type cell,wherein the event 1b of the first-type cell is that signal quality orsignal strength of the first-type cell is lower than a predeterminedcriterion.
 3. The method according to claim 1, further comprising: if afirst-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset, and one of an optimal cell and a serving cell is the second-typecell, skipping reporting an event 1b of the first-type cell, or skippingusing a measurement result of the second-type cell to affect eventevaluation of the first-type cell, wherein the event 1b of thefirst-type cell is that signal quality or signal strength of thefirst-type cell is lower than a predetermined criterion.
 4. The methodaccording to claim 1, further comprising: triggering reporting of theevent to the control node according to the event trigger threshold andone of the cell signal quality and signal strength of the cell, whereinthe dedicated parameter for evaluating the event trigger threshold isused to evaluate the event trigger threshold.
 5. The method according toclaim 4, wherein the dedicated parameter for evaluating the eventtrigger threshold comprises: one of a relative dedicated offset forevaluating the event trigger threshold and an absolute dedicatedparameter for evaluating the event trigger threshold.
 6. The methodaccording to claim 4, wherein the dedicated parameter for evaluating theevent trigger threshold comprises one or more of the followingparameters: a cell individual offset CIO, a hysteresis, a weight, and areporting range.
 7. The method according to claim 1, further comprising:if the cell is a first-type cell indicated by the measurementconfiguration information, measuring the cell and reporting themeasurement result of the cell to the control node.
 8. A measurementcontrol method, comprising: sending, by a control node, measurementconfiguration information to a user equipment (UE), wherein themeasurement configuration information comprises one of a list offirst-type cells, a type of first-type cells, a list of second-typecells, a type of second-type cells, hierarchical cell structure (HCS)priorities, a frequency of first-type cells, and a dedicated parameterfor evaluating an event trigger threshold; receiving, by the controlnode, one of an event and a measurement result reported by the UE; andsending, by the control node, an active set update message to the UEaccording to one of the event and measurement result.
 9. A measurementcontrol method, comprising: receiving, by a control node, an event 1b ofa cell reported by a user equipment (UE); and determining, by thecontrol node, according to measurement configuration information and theevent 1b, whether to send an active set update message to the UE,wherein the measurement configuration information comprises one of alist of first-type cells, the type of first-type cells, a list ofsecond-type cells, the type of second-type cells, hierarchical cellstructure (HCS) priorities, a frequency of first-type cells, and adedicated parameter for evaluating an event trigger threshold, whereinthe event 1b of the cell is that one of signal quality and signalstrength of the cell is lower than a predetermined criterion.
 10. Themethod according to claim 9, further comprising: if a first-type celland a second-type cell that are indicated by the measurementconfiguration information simultaneously exist in an active set of theUE, skipping sending an active set update message for removing thefirst-type cell.
 11. The method according to claim 9, furthercomprising: if a first-type cell and a second-type cell that areindicated by the measurement configuration information simultaneouslyexist in an active set of the UE, and an optimal cell or a serving cellis the second-type cell, skipping sending an active set update messagefor removing the first-type cell to the UE.
 12. A user equipment (UE),comprising: a receiver, configured to receive measurement configurationinformation sent by a control node, wherein the measurementconfiguration information comprises one of a list of first-type cells,the type of first-type cells, a list of second-type cells, the type ofsecond-type cells, hierarchical cell structure (HCS) priorities, afrequency of first-type cells, and a dedicated parameter for evaluatingan event trigger threshold; a processor, configured to detect one ofcell signal quality and signal strength of a cell; and a transmitter,configured to determine, according to one of the cell signal quality andsignal strength and the measurement configuration information whether toreport one of an event and a measurement result to the control node. 13.The UE according to claim 12, wherein the transmitter is furtherconfigured to: when a first-type cell and a second-type cell that areindicated by the measurement configuration information simultaneouslyexist in an active set, skip reporting an event 1b of the first-typecell, or skip using a measurement result of the second-type cell toaffect event evaluation of the first-type cell, wherein the event 1b ofthe first-type cell is that one of signal quality and signal strength ofthe first-type cell is lower than a predetermined criterion.
 14. The UEaccording to claim 12, wherein the transmitter is further configured to:when a first-type cell and a second-type cell that are indicated by themeasurement configuration information simultaneously exist in an activeset, and one of an optimal cell and a serving cell is the second-typecell, skip reporting an event 1b of the first-type cell, or skip using ameasurement result of the second-type cell to affect event evaluation ofthe first-type cell, wherein the event 1b of the first-type cell is thatone of signal quality and signal strength of the first-type cell islower than a predetermined criterion.
 15. The UE according to claim 12,wherein the transmitter is further configured to: trigger reporting ofthe event according to the event trigger threshold and one of the cellsignal quality and signal strength of the cell, to the control nodesending an active set update message to the UE according to the receivedevent, wherein the dedicated parameter for evaluating the event triggerthreshold is used to evaluate the event trigger threshold.
 16. The UEaccording to claim 12, wherein the transmitter is further configured to:report the measurement result of the cell to the control node when thecell is a first-type cell indicated by the measurement configurationinformation.
 17. A control node, comprising: a transmitter, configuredto send measurement configuration information to a user equipment (UE),wherein the measurement configuration information comprises one of alist of first-type cells, the type of first-type cells, a list ofsecond-type cells, the type of second-type cells, hierarchical cellstructure (HCS) priorities, a frequency of first-type cells, and adedicated parameter for evaluating an event trigger threshold; and areceiver, configured to: responsive to the UE having determined,according to the measurement configuration information and one of cellsignal quality and signal strength, to report an event or a measurementresult, receive one of the event and the measurement result reported bythe UE; wherein the transmitter is further configured to send an activeset update message to the UE according to one of the event and themeasurement result received.
 18. A control node, comprising: a receiver,configured to receive an event 1b of a cell reported by a user equipment(UE), wherein the event 1b of the cell is that one of signal quality andsignal strength of the cell is lower than a predetermined criterion; anda transmitter, configured to determine, according to measurementconfiguration information and the event 1b, whether to send an activeset update message to the UE, wherein the measurement configurationinformation comprises one of a list of first-type cells, the type offirst-type cells, a list of second-type cells, the type of second-typecells, hierarchical cell structure (HCS) priorities, a frequency offirst-type cells, and a dedicated parameter for evaluating an eventtrigger threshold.
 19. The control node according to claim 18, whereinthe transmitter is further configured to: when a first-type cell and asecond-type cell that are indicated by the measurement configurationinformation simultaneously exist in an active set of the UE, skipsending an active set update message for removing the first-type cell.20. The control node according to claim 18, wherein the transmitter isfurther configured to: when a first-type cell and a second-type cellthat are indicated by the measurement configuration informationsimultaneously exist in an active set of the UE, and an optimal cell ora serving cell is the second-type cell, skip sending, to the UE, anactive set update message for removing the first-type cell.